List of shipwrecks in May 1940

The list of shipwrecks in May 1940 includes all ships sunk, foundered, grounded, or otherwise lost during May 1940. Most of the ships listed here were lost in connection with World War II.

1 May

 * SS Arlington (🇨🇦 Canada): The cargo ship sank during a storm in Lake Superior.
 * SS Bahia Castillo (1917) : World War II: The troop ship was torpedoed and damaged in the Skaggerak south east of Skagen, Denmark by HMS Narwhal (N45) . The ship was towed into Frederikshavn, and it was scrapped at Kiel, Germany in September 1940.
 * SS Beaufort (1929) (🇳🇴 Norway): World War II: The tanker was bombed and damaged at Øye by Luftwaffe aircraft, then scuttled by own crew. Raised in September 1941, laid up, repaired post-war.
 * Buenos Aires : World War II: Norwegian Campaign: The troopship was torpedoed and sunk in the Skaggerak east of Skagen by HMS Narwhal.
 * Dronning Maud (🇳🇴 Norway): World War II: The troopship was bombed and sunk in Gratangen, off Foldvik by aircraft of Lehrgeschwader 1, Luftwaffe, with the loss of eighteen lives.
 * SS Haga (1918) (🇸🇪 Sweden): World War II: The cargo ship struck a mine and sank in the Kattegat with the loss of four crew.
 * La Cancalaise (🇫🇷 France): World War II: The trawler struck a mine and sank in the North Sea off the Dyck Lightship with the loss of more than twelve crew.
 * SS Matakana (🇬🇧 United Kingdom): The refrigerated cargo ship ran aground in the Caribbean off Mayaguana, Bahamas and was wrecked. Her 78 crew were rescued by SS Panama (1939) (United States.
 * SS Pioner I (🇳🇴 Norway): World War II: The coaster was bombed and sunk at Hjørungavåg, Møre og Romsdal by Luftwaffe aircraft. Later raised, repaired and entered Kriegsmarine service as Raeter.
 * Uller : World War II: The Vale-class gunboat was bombed and damaged in Sognefjord by Heinkel He 115 aircraft of the Royal Norwegian Navy Air Service. She was subsequently scuttled by Tyr.
 * HNOMS Veslefrikk : World War II: The guard ship was run aground in Lønnefjord, Sogn og Fjordane, Norway, to prevent capture by the Germans.

2 May
For the loss of RFA Boardale on this day, see the entry for 30 April 1940.
 * Bison : World War II: Namsos Campaign: The Guépard-class destroyer was bombed and damaged off Trondheim, Norway (65.7°N, 7.28333°W) by Luftwaffe aircraft. She was scuttled by HMS Afridi (F07), which had rescued the survivors.
 * Cläre Hugo Stinnes 1 (🇩🇪 Germany): World War II: The cargo ship was shelled off Skorpa, Norway by HMS Trident and beached. She was later salvaged, repaired and returned to service.
 * HNoMS Djerv : World War II: The 2.-class torpedo boat was scuttled off Kvamsøya to prevent capture by German forces.
 * HNoMS Dristig : World War II: The 2.-class torpedo boat was scuttled off Kvamsøya to prevent capture by German forces.
 * SS Redstone (🇬🇧 United Kingdom): World War II: The cargo ship was scuttled as a blockship at Scapa Flow Orkney Islands.

3 May
For the loss of HMTs Aston Villa, Gaul and St Goran on the day, see the entry for 30 April 1940.
 * HMS Afridi (F07) : World War II: The Tribal-class destroyer was bombed and sunk in the Norwegian Sea off Namsos, Norway (66.23333°N, 5.75°W) by Junkers Ju 87 aircraft of the Luftwaffe with the loss of 49 of her 219 crew and at least 43 other people. The survivors were rescued by HMS Griffin (H31) and HMS Imperial (D09) (both )
 * GERMAN MINESWEEPER H A W Müller : World War II: The naval trawler was torpedoed and sunk in the Skaggerak (58.13333°N, 6.65°W) by HMS Narwhal (N45).
 *  Magicienne (🇩🇰 Denmark): The schooner ran aground west of St Abb's Head, Berwickshire, United Kingdom. All eight crew survived.
 * SS Scientist (🇬🇧 United Kingdom): World War II: The cargo ship was shelled and sunk in the South Atlantic (-19.91667°N, 4.33333°W) by GERMAN AUXILIARY CRUISER Atlantis with the loss of two crew.

4 May
For the loss of the Norwegian coastal tanker MV Rødskjæl'', which may have occurred on this date, see the list for April 1940.
 * SS Aafjord (🇳🇴 Norway): World War II: The coaster was bombed and sunk in Breiviken by Luftwaffe aircraft. Later raised, repaired and returned to service.
 * Aimy (🇸🇪 Sweden): World War II:The fishing boat struck a mine in the Kattegat (57.55°N, 11.58333°W) and sank with the loss of all four crew.
 * SS Blaafjeld I (🇳🇴 Norway): The cargo ship was bombed and sunk near Kolvereid, Nord-Trøndelag, by Luftwaffe aircraft. All crew were rescued.
 * ORP Grom : World War II: The Grom-class destroyer was bombed and sunk in Ofotfjord off Narvik, Norway by Luftwaffe aircraft with the loss of 59 of her 192 crew. The survivors were rescued by HMS Aurora (12), HMS Bedouin (F67), HMS Enterprise (D52) and HMS Faulknor (H62) (all ).
 * Monark (🇩🇪 Germany): World War II: The captured Swedish cargo ship was intercepted in the North Sea off Stavanger, Norway by HMS Severn . After the German prize crew was captured and the Norwegian crew members set ashore, she was torpedoed and sunk.
 * SS Pan (1922) (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk in the Norwegian Sea off Namsos, Nord-Trøndelag by Luftwaffe aircraft. The wreck was raise in 1942, repaired and returned to service.
 * SS San Tiburcio (United States): World War II: The tanker struck a mine in the Moray Firth off Balintore, Ross-shire, United Kingdom and sank. All crew were rescued by HMS Codrington (D65) and HMT Leicester City (both ).
 * SS Sekstant (1919) (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk in the Norwegian Sea off Namsos by Luftwaffe aircraft. All crew were rescued.

5 May

 * SS Eldrid (🇳🇴 Norway): World War II: The damaged cargo ship was scuttled at Narvik, Nordland by German forces.
 * SS Graig (🇬🇧 United Kingdom): The cargo ship ran aground at Egg Island, Nova Scotia, Canada and broke in two.
 * Maianbar (🇦🇺 Australia): The cargo ship ran aground off Newcastle, New South Wales. She was declared a total loss.
 * SS Richard With (🇳🇴 Norway): World War II: The cargo liner was attacked and damaged off Sørreisa, Troms by Luftwaffe aircraft and was beached. Later refloated, repaired and returned to service.
 * HNoMS Sild : World War II: The 1.-class torpedo boat was scuttled in the Norwegian Sea off Harøya, Møre og Romsdal to prevent capture by German forces.

6 May

 * Brage (🇩🇪 Germany): World War II: The cargo ship struck a mine in the North Sea off the Kiel Lightship (🇩🇪 Germany) and sank.
 * SS Brighton (1928) (🇬🇧 United Kingdom): World War II: The tanker struck a mine and sank in the North Sea off Dunkerque, Nord, France (51.05°N, 2.15°W). All 34 crew were rescued.
 * HMT Loch Naver (A41) : The naval trawler collided with another vessel off Hartlepool, Co Durham and sank. The survivors were rescued by the yacht Breda (🇬🇧 United Kingdom).
 * GERMAN PATROL BOAT V-101 : The vorpostenboot sank in the Kattegat.
 * GERMAN PATROL BOAT V-811 : World War II: The vorpostenboot struck a mine in the Ems estuary and sank.
 * SS Vogesen (1903) (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank in the Kattegat (57.55°N, 11.58333°W).

7 May

 * SS Folden (1905) (🇳🇴 Norway): World War II: The coaster was bombed and sunk off Helgeland by Luftwaffe aircraft.
 * Saint Pierre (🇧🇪 Belgium): World War II: The fishing boat struck a mine in the North Sea and sank.

8 May

 * Gerda (🇩🇰 Denmark): World War II: The cargo ship struck a mine in the North Sea off Bergen, Hordaland, Norway and sank.
 * HNoMS Skrei : World War II: The 1.-class torpedo boat was scuttled off Aspøya, Møre og Romsdal, Norway to prevent capture by German forces.

9 May

 * SS Ashley (🇬🇧 United Kingdom): The cargo ship ran aground of the Goodwin Sands, Kent and sank.
 * SS Corrientes (1920) (🇩🇪 Germany): World War II: The tanker was sabotaged and sunk at Las Palmas, Canary Islands, Spain by French divers.
 * Doris : World War II: The Circé-class submarine was torpedoed and sunk in the North Sea west of Petten, North Holland, Netherlands (53.66667°N, 4°W) by GS U-9 (1935) ( with the loss of all 44 crew and three Royal Navy officers.
 * GERMAN MINESWEEPER M-134 : World War II: The minesweeper was bombed and sunk at Bergen, Norway by Blackburn Skua aircraft of 806 Naval Air Squadron, Fleet Air Arm or Bristol Blenheim aircraft of 254 Squadron, Royal Air Force. She was later salvaged by the Germans and re-entered service as a patrol boat named Jungingen.

10 May

 * SS Boschdijk (🇳🇱 Netherlands): World War II: The cargo ship was bombed and sunk at Rotterdam by Luftwaffe aircraft.
 * ST Calaisien (🇫🇷 France): World War II: The tug was bombed and sunk at Calais, Pas-de-Calais by Luftwaffe aircraft.
 * SS Campinas (1921) (🇩🇪 Germany): World War II: The troopship struck a mine in the Kattegat off Drogden, Norway and sank.
 * HNLMS de Oceaan (B-4) : World War II: The tug was scuttled in the Wadden Sea between Ameland and Terschelling.
 * SS Goslar (1929) (🇩🇪 Germany): World War II: The cargo ship was scuttled at Paramaribo, Suriname to avoid capture by Dutch forces.
 * SS Henry Woodall (🇬🇧 United Kingdom): World War II: The collier struck a mine and sank in the North Sea 3 nmi off Withernsea, Yorkshire with the loss of seven of her fourteen crew. The survivors were rescued by SS Viiu (🇪🇪 Estonia.
 * SS Nordnorge (1923) : World War II: The coaster used as a troopship was shelled, torpedoed and sunk at Hemnesberget, Norway by HMS Calcutta (D82) and HMS Zulu (F18) (both ).
 * HNLMS Van Galen : World War II: The Admiralen-class destroyer was bombed and damaged in the Waalhaven, Rotterdam by Luftwaffe aircraft. She later sank in the Merwedehaven.

11 May

 * Antilla (🇩🇪 Germany): World War II: The cargo ship was scuttled in the Caribbean Sea off Aruba, Netherlands Antilles to avoid capture by the Dutch.
 * SS Makis (🇬🇷 Greece): World War II: The cargo ship struck a mine and sank in the Mediterranean Sea off Pantelleria, Italy.
 * SS Sally (1896) (🇫🇮 Finland): World War II: The cargo ship struck a mine and sank in the Kattegat.
 * Statendam (🇳🇱 Netherlands): World War II: The ocean liner was sunk at Rotterdam, South Holland in a Luftwaffe air raid.
 * SS Stella (1909) (🇳🇱 Netherlands): World War II: The cargo ship was bombed and sunk in the North Sea off Vlissingen, Zeeland by Luftwaffe aircraft.
 * SS Tringa (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the North Sea off Ostend, West Flanders, Belgium by GS U-9 (1935) with the loss of seventeen of the 23 people on board. The survivors were rescued by HMS Malcolm (D19).
 * Veendam (🇳🇱 Netherlands): World War II: The ocean liner was sunk at Rotterdam in a Luftwaffe air raid.
 * SS Viiu (🇪🇪 Estonia): World War II: The cargo ship was torpedoed and sunk in the North Sea (51.35°N, 2.41667°W. by GS U-9 (1935) . Only five people on board survived. They were rescued by HMT Arctic Hunter.

12 May

 * HNLMS Friso : World War II: The Gruno-class gunboat was bombed and sunk in the IJsselmeer off Enkhuizen, North Holland by Luftwaffe aircraft.
 * HMCS Gate Vessel No. 1 : World War II: Convoy TC 4A: The naval trawler (A.K.A. HMCS Ypres) was struck by HMS Revenge (06) at Halifax, Nova Scotia and sank. All eighteen crew were rescued.
 * MV Henrica (🇳🇱 Netherlands): The coaster collided with another vessel and sank.
 * MV Jura (🇨🇭 Switzerland): World War II: The tanker struck a mine and sank in the North Sea off Zeebrugge, West Flanders, Belgium with the loss of two lives.
 * Käthe Jürgensen (🇩🇪 Germany): World War II: The cargo schooner struck a mine and sank in the Bay of Lübeck, Germany.
 * SS Prinses Juliana (1920) (🇳🇱 Netherlands): World War II: The passenger ship was bombed and sunk in the North Sea off Hoek van Holland, South Holland by Luftwaffe aircraft. The survivors were rescued by HMS Havock (H43) and HMS Wild Swan (D62) (both ).
 * SS Ranheim (1913) (🇳🇴 Norway): World War II: The coaster was shelled and sunk at Hemnesberget, Nordland by HMS Carlisle (D67) and HMS Zulu (F18) (both ).
 * SS Roek (🇬🇧 United Kingdom): World War II: The coaster struck a mine and sank in the Nieuwe Waterweg Rotterdam, South Holland, Netherlands (51.9°N, 4.35°W). All 51 people on board wre rescued.
 * SS St Denis (🇬🇧 United Kingdom): World War II: the cargo ship struck a mine and sank in the Nieuwe Waterweg between Hoek van Holland and Rotterdam.
 * SS Van Rensselaer (🇳🇱 Netherlands): World War II: The passenger ship struck a mine at IJmuiden, Noord Holland and was beached.

13 May

 * SS Anhalt (1922) (🇩🇪 Germany): World War II: The troopship struck a mine and was beached off the coast of Sweden. She was later repaired and returned to service.
 * SS Bussum (🇳🇱 Netherlands): World War II: The cargo ship was bombed and damaged in the North Sea off the Noord Hinder Lightship (🇳🇱 Netherlands). She was abandoned by her 29 crew, who were rescued by FRENCH TORPEDO BOAT Bouclier . Bussum was towed to London, United Kingdom and was subsequently repaired and returned to service.
 * HNLMS Christiaan Cornelis : World War II: The K-class torpedoboat was scuttled at Rotterdam, South Holland following severe battle damage.
 * SS Gorm (🇧🇪 Belgium): World War II: The cargo ship struck a mine in the North Sea off Zeebrugge, West Flanders (51.37°N, 3.21639°W) and sank.
 * SS Kyle Firth (🇬🇧 United Kingdom): The cargo ship ran aground on Holy Island, Anglesey and was wrecked.
 * HNLMS M 2 : World War II: The M-class minesweeper struck a mine in the North Seaoff IJmuiden, North Holland and sank.
 * FRENCH MINESWEEPER Ville du Bizerte : World War II: The auxiliary minesweeper struck a mine and sank in the Mediterranean Sea off Cape Guardia, Algeria.

14 May

 * HNLMS Abraham van der Hulst : World War II: Jan van Amstel-class minesweeper was scuttled at Enkhuizen, Noord Holland. She was subsequently salvaged by the Germans, repaired and entered service as M 552.
 * Batterijschip IJmuiden : World War II: The former coastal defence ship Jacob Van Heemskerck was scuttled at IJmuiden to prevent capture by German forces. She was subsequently salvaged by the Germans, repaired and entered service as Undine.
 * HNLMS Brinio : World War II: The Gruno-class gunboat was bombed and damaged in the IJsselmeer by Luftwaffe aircraft and subsequently scuttled.
 * Chrobry (🇵🇱 Poland): World War II: The troopship was bombed and damaged in the Vestfjorden, off Nordland, Norway. She was scuttled on 16 May due to damage received.
 * HNLMS Gerard Callenburgh : World War II: The Gerard Callenburgh-class destroyer was scuttled in the Nieuwe Waterweg, Rotterdam, South Holland to prevent capture by German forces.
 * HNLMS Johan Maurits van Nassau : World War II: The sloop was bombed and sunk in the North Sea 10 nmi west of Callantsoog, North Holland, by Luftwaffe aircraft with the loss of eight of her 124 crew.
 * SS Jan Pieterszoon Coen (🇳🇱 Netherlands): World War II: The passenger ship was scuttled as a Blockship at IJmuiden, North Holland.
 * HNLMS G 16 : World War II: The G 13-class torpedo boat was scuttled at Den Helder.
 * HNLMS Tjerk Hiddes : World War II: The Gerard Callenburgh-class destroyer was scuttled in the Nieuwe Waterweg, Rotterdam, South Holland to prevent capture by German forces.
 * HNLMS M 1 : World War II: The M-class minesweeper was scuttled at IJmuiden.
 * HNLMS M 3 : World War II: The M-class minesweeper was scuttled as a blockship at IJmuiden.
 * HNLMS M 4 : World War II: The M-class minesweeper was scuttled at IJmuiden.
 * HNLMS Noordzee II (BV-64) : World War II: The naval tug struck a mine and sank in the Westerschelde.
 * HNLMS O 8 : World War II: The O 8-class submarine was scuttled at Den Helder, North Holland to prevent capture by German forces. She was subsequently salvaged by the Germans, repaired and entered service as U-D1.
 * HNLMS O 11 : World War II: The O 9-class submarine was scuttled at Den Helder to prevent capture by German forces. She was subsequently salvaged by the Germans, repaired and entered service as U-D2.
 * HNLMS O 12 : World War II: The O 12-class submarine was scuttled at Den Helder while undergoing maintenance at the Rijkswerf shipyard to prevent capture by German forces.
 * HNLMS O 25 : World War II: The O 21-class submarine was scuttled at Schiedam, South Holland to prevent capture by German Forces. She was subsequently salvaged by the Germans, repaired and entered service as UD-3.
 * HNLMS O 26 : World War II: The O 21-class submarine was scuttled at Schiedam, South Holland to prevent capture by German Forces. She was subsequently salvaged by the Germans, repaired and entered service as UD-4.
 * HNLMS O 27 : World War II: The O 21-class submarine was scuttled at Schiedam, South Holland to prevent capture by German Forces. She was subsequently salvaged by the Germans, repaired and entered service as UD-5.
 * HNLMS Pieter Florisz : World War II: The Jan van Amstel-class minesweeper was scuttled at Enkhuizen.
 *  Scalaria (🇦🇺 Australia): The sailing ship sank in the Pacific Ocean off Wyndham, Western Australia.
 * SS Ville de Bruges (🇧🇪 Belgium): World War II: The ocean liner was severely damaged in a Luftwaffe air raid whilst in the Scheldt, between Lillo and Doel. She was beached and burnt out with the loss of four crew of the 117 people aboard. The ship was scrapped in situ 1941–46, final remains removed 1951–52.
 * HNLMS Z 3 : World War II: The Z 1-class torpedo boat was scuttled in the IJsselmeer off Enkhuizen.

15 May

 * FRENCH MINESWEEPER Duquesne II : World War II: The auxiliary minesweeper struck a mine at the mouth of the Scheldt and sank.
 * SS Evgenia (🇬🇷 Greece): World War II: The cargo ship was bombed and damaged in the Scheldt at Knokke, West Flanders, Belgium (51.38333°N, 3.11667°W) by Luftwaffe aircraft. She was abandoned the next day and scuttled two days later in the Zeebrugge Roads.
 * SS Foscolo ( undefined): World War II: The cargo ship was bombed and damaged in the North Sea 6 nmi off Zeebrugge, West Flanders, Belgium by Luftwaffe aircraft. She capsized and sank on 18 May.
 * FRENCH MINESWEEPER Henre Guegan : World War II: The auxiliary minesweeper struck a mine at the mouth of the Scheldt and sank.
 * HNLMS Hydra : World War II: The Hydra-class minelayer was beached on the coast of Zeeland following damage by German anti-tank gunfire. She was subsequently scuttled.
 * MV Loodsboot No.1 (🇳🇱 Netherlands): World War II: The pilot vessel struck a mine and sank in the Westerscheldt.
 * HMS M A West : The dredger sank in the North Sea off Great Yarmouth, Norfolk.
 * HMS Valentine (D49) : World War II: The V-class destroyer was bombed off Terneuzen, Zeeland, Netherlands by a Junkers Ju 88 aircraft of the Luftwaffe with the loss of 52 crew. She was beached and abandoned. HMS Valentine was then scuttled by HMS Whitley (L23).

16 May
No ships were lost on this day.

17 May

 * HNLMS Philips Van Almonde : World War II: The Gerard Callenburgh-class destroyer was scuttled on her slipway at Vlissingen, Zeeland to prevent capture by German forces.
 * FRENCH MINESWEEPER Mardyck : World War II: The auxiliary minesweeper caught fire and was beached and abandoned at Breskins.
 * SS Saint Kearan (🇬🇧 United Kingdom): The cargo ship collided with SS Explorateur Grandidier (🇫🇷 France) in the Firth of Clyde and sank north west of Girvan, Ayrshire.

18 May

 * HMS Effingham (D98) : World War II: Norwegian Campaign: The Hawkins-class cruiser ran aground on a reef in the Norwegian Sea near Bodø, Nordland, Norway (67.28333°N, 13.96667°W) and abandoned. She was subsequently scuttled by gunfire and torpedoes from HMS Matabele (F26) on May 21.
 * Pia (🇳🇱 Netherlands) : World War II: The fishing vessel was towing the yacht Albatross III (🇳🇱 Netherlands) when she struck a mine in the North Sea off Gravelines, Nord, France. with the loss of six of her seven crew. Four people were killed on board Albatross II, which rescued the sole survivor from Pia.
 * SS Torgtind (🇳🇴 Norway): World War II: The cargo ship was bombed and sunk in the Norwegian Sea off Bratland, Lurøy by Luftwaffe aircraft.
 * SS Vlaanderen I (🇧🇪 Belgium): World War II: The dredger was bombed and sunk at Calais, Pas-de-Calais, France by Luftwaffe aircraft.

19 May

 * Albion : World War II: The former trawler was sunk in Sognefjord by HNoMS Heilhorn and HNoMS Honningsvåg (both ).
 * FRENCH MINESWEEPER Augustin Normand : World War II: The auxiliary minesweeper was bombed and sunk in the English Channel off Le Havre, Seine-Maritime by Luftwaffe aircraft.
 * Belgica (🇳🇴 Norway): World War II: The depot ship was scuttled at Harstad, Troms by the Franco-British Expeditionary Force.
 * MV Erik Frisell (🇸🇪 Sweden): World War II: The cargo ship was shelled and sunk in the Atlantic Ocean west of the Hebrides, United Kingdom (57.41667°N, -9.25°W) by GS U-37 (1938) . All 34 crew were rescued by HMT Cobbers.
 * HMS Princess Victoria : World War II: The minelayer struck a mine and sank off the mouth of the Humber with the loss of 36 of her 121 crew.
 * SS Torgtind (🇳🇴 Norway): World War II: The coaster was bombed and sunk off Lurøy, Nordland by Luftwaffe aircraft. All on board survived.
 * SS Vlaanderen IV (🇧🇪 Belgium): The dredger was bombed and sunk in the North sea off Dunkerque, Nord, France.
 * HMS Whitley (L23) : World War II: The W-class destroyer was bombed and damaged off Ostend, West Flanders, Belgium by Luftwaffe aircraft. She was beached and later scuttled by HMS Keith (D06).

20 May

 * SS Antverpia (🇧🇪 Belgium): World War II: The cargo ship was bombed and severely damaged in the English Channel off Boulogne, Pas-de-Calais, France in a Luftwaffe air raid. She was beached on 21 May, but bombed again on 23 May and set on fire.
 * Deneb (🇳🇴 Norway): World War II: The cargo ship was bombed and set on fire at Harstad, Troms in a Luftwaffe air rad. She was scuttled the next day by a British destroyer.
 * ST Hercule (🇫🇷 France): The tug struck a mine and sank at Calais, Pas-de-Calais.
 * SS Mavis (🇬🇧 United Kingdom): World War II: The coaster was bombed and damaged in the English Channel off Calais by Luftwaffe aircraft. She was later abandoned.
 * FRENCH TANKER Niger : World War II: The tanker was bombed and sunk off Gravelines, Nord by Luftwaffe aircraft. All crew were rescued by FRENCH DESTROYER Cyclone.
 * SS Ophélie (🇫🇷 France): World War II: The tanker was bombed and sunk in the English Channel off Boulogne.
 * MV Pembroke Coast (🇬🇧 United Kingdom): World War II: The cargo ship was bombed and damaged off Harstad, Norway by Luftwaffe aircraft. She was scuttled the next day.
 * HMT Rifsness : World War II: The auxiliary minesweeper was bombed and sunk in the North Sea off Ostend, West Flanders, Belgium by Luftwaffe aircraft. The crew were rescued by HMT Lord Inchcape.
 * S.130 and S.175 (both 🇩🇰 Denmark): The trawlers were intercepted in the North Sea at 55°N, 3.5°W by HMS Spearfish (69S) . The crews of both vessels were taken off and they were sunk by gunfire.

21 May

 * ST Barfleur (🇫🇷 France): World War II: The tug was scuttled at Boulogne, Pas-de-Calais.
 * SS Bawtry (🇬🇧 United Kingdom): World War II: The coaster was bombed and sunk at Dunkerque, Nord by Luftwaffe aircraft. She was later salvaged by the Germans and entered service as Rival.
 * HMT Cape Passaro (FY 270) : World War II: The naval trawler was bombed and sunk off Narvik, Nordland, Norway by Luftwaffe aircraft with the loss of four crew.
 * SS Clairy (🇵🇦 Panama): World War II: The tanker was bombed and damaged in the English Channel off Boulogne by Luftwaffe aircraft. She sank the next day, all crew were rescued.
 * Chasseur 9 : The submarine chaser was bombed and severely damaged in the North Sea off Dunkerque. She was beached to prevent her sinking but was declared a total loss.
 * FRENCH MINESWEEPER Christiane Cecile) : World War II: The auxiliary minesweeper was scuttled at Boulogne.
 * HMS Corburn : World War II: The auxiliary minesweeper was torpedoed and sunk in the English Channel off Le Havre, Seine-Maritime by motor torpedo boat S-32.
 * De Normandie (🇧🇪 Belgium): World War II: The fishing boat struck a mine and sank off Dieppe, Seine-Maritime with the loss of thirteen lives.
 * Ernestine Gabrielle (🇧🇪 Belgium): World War II: The fishing boat was bombed and sunk at Dieppe by Luftwaffe aircraft.
 * SS Firth Fisher (🇬🇧 United Kingdom): World War II: The coaster struck a mine in the English Channel off Boulogne and sank with the loss of seven of the eleven people on board. The survivors were rescued by SS Sparta (🇬🇧 United Kingdom).
 * Georgette Simone (🇧🇪 Belgium): World War II: The fishing boat was bombed and sunk at Dieppe by Luftwaffe aircraft.
 * SS Hubbastone (🇬🇧 United Kingdom): World War II: The coaster was bombed and sunk at Dieppe by Luftwaffe aircraft. She was later salvaged by the Germans, repaired and entered service as Jurgensby.
 * Independence (🇧🇪 Belgium): World War II: The fishing boat was bombed and sunk at Dieppe by Luftwaffe aircraft.
 * FRENCH MINESWEEPER Jacques Coeur : World War II: The auxiliary minesweeper was bombed and sunk at Dunkerque, Nord by Luftwaffe aircraft.
 * L'Adroit : World War II: The Adroit-class destroyer was bombed and sunk in the North Sea off Dunkerque by a Heinkel He 111 aircraft of the Luftwaffe.
 * FRENCH MINESWEEPER Leopold Soubler) : World War II: The auxiliary minesweeper was scuttled at Boulogne.
 *  : World War II: The hospital ship was bombed and sunk at Dieppe by Luftwaffe aircraft with the loss of 37 lives.
 * HMT Melbourne : World War II: The naval trawler was bombed and sunk off Narvik by Luftwaffe aircraft.
 * Nelly Suzanne (🇧🇪 Belgium): World War II: The fishing boat was bombed and sunk at Dieppe by Luftwaffe aircraft.
 * FRENCH MINESWEEPER Notre Dame de Lorette) : World War II: The auxiliary minesweeper was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * ST Orme (🇫🇷 France): World War II: The tug was scuttled at Boulogne.
 * SS Pavon (🇫🇷 France): World War II: The cargo ship was bombed and sunk in the English Channel off Calais, Pas-de-Calais by Luftwaffe aircraft. The crew were rescued by FRENCH DESTROYER Cyclone, FRENCH DESTROYER Mistral and FRENCH DESTROYER Sirocco (all ).
 * FRENCH MINESWEEPER Rien Sans Peine) : World War II: The auxiliary minesweeper was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * FRENCH MINESWEEPER Saint Benoit) : World War II: The auxiliary minesweeper was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * FRENCH MINESWEEPER Saint Joachim) : World War II: The auxiliary minesweeper was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * SS Salome (🇫🇷 France): World War II: The tanker was bombed and sunk at Calais by Luftwaffe aircraft. The crew were rescued by FRENCH DESTROYER Cyclone, FRENCH DESTROYER Mistral and FRENCH DESTROYER Sirocco (all ).
 * SS Spinel (🇬🇧 United Kingdom): World War II: The cargo ship was bombed and sunk at Dunkerque by Luftwaffe aircraft. She was salvaged by the Germans on 4 July, repaired and entered German service.
 * ST Tumulte (🇫🇷 France): World War II: The tug was bombed and sunk at Dunkerque by Luftwaffe aircraft.

22 May

 * BELGIAN YACHT Aloha : World War II: The motor yacht struck a mine and sank in the North Sea off Ostend, West Flanders with the loss of all crew.
 * SS Bjarkøy (🇳🇴 Norway): World War II: The coaster was bombed and sunk at Gratangsbotn, Troms. Raised in 1944, repaired and returned to service as Bogøy.
 * SS Efford (🇬🇧 United Kingdom): The coaster collided with SS Tlemcen (🇫🇷 France) in the North Sea off Gravelines, Nord, France and sank.
 * SS Helene (1898) (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank in the Wadden Sea between Schiermonnikoog and Simonszand, Groningen, Netherlands.
 * SS Palena (🇨🇱 Chile): The cargo liner came ashore in a storm at Valparaiso and was wrecked.
 * SS Portrieux (🇫🇷 France): World War II: The cargo ship was bombed and sunk in the North Sea off Gravelines, Nord by Luftwaffe aircraft.
 * Teaser (🇬🇧 United Kingdom): World War II: The fishing smack struck a mine and sank in the River Blackwater off Tollesbury, Essex. Both crew were rescued.

23 May

 * SS Franz Haniel (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank in the Baltic Sea off Kiel, Schleswig-Holstein.
 * SS Galaxias (🇬🇷 Greece): World War II: The cargo ship was bombed and sunk in the English Channel off Dieppe, Seine-Maritime, France by Luftwaffe aircraft. All crew were rescued.
 * Jaguar : World War II: Operation Dynamo: The Chacal-class destroyer was torpedoed and sunk in the North Sea off Dunkerque, Nord by motor torpedo boats S-21 and S-23 (both ) with the loss of thirteen crew.
 * Orage : World War II: The Bourrasque-class destroyer was bombed and sunk off Boulogne, Pas-de-Calais by Luftwaffe aircraft.
 * SS Sigurds Faulbaums (1913) : World War II: The cargo ship was torpedoed and sunk in the North Sea off the Noord Hinder Lightvessel (51.48333°N, 2.63333°W) by U-9 The crew were rescued by ST Graaf Visart (🇧🇪 Belgium).
 * Terieven (🇩🇰 Denmark): World War II: The fishing vessel was intercepted in the North Sea (56.91667°N, 6.83333°W) by HMS Tetrarch (N77) and was scuttled by her.

24 May

 * SS Brighton (1933) (🇬🇧 United Kingdom): World War II: The hospital ship was bombed and sunk in the North Sea off Dieppe, France by Luftwaffe aircraft.
 * Chacal : World War II: The Chacal-class destroyer was bombed and sunk off Boulogne, Pas de Calais by Luftwaffe aircraft.
 * FRENCH MINESWEEPER Etoile de Nord : World War II: The auxiliary minesweeper struck a mine and sank in the North Sea off Dunkerque, Nord.
 * Ingrid : World War II: Norwegian Campaign: The patrol boat, formerly the German trawler Wilhelm Reinhold, was sunk sunk by German bombers at Bodø.
 * SS Kyma (🇬🇷 Greece): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Land's End, Cornwall, United Kingdom (48.5°N, -9.5°W by GS U-37 (1938) with the loss of seven of her 30 crew.
 * FRENCH MINESWEEPER La Matelot : World War II: The auxiliary minesweeper was bombed and sunk in the North Sea off Dunkerque by Luftwaffe aircraft.
 * SS Skjerstad (1904) (🇬🇧 United Kingdom): World War II: The supply vessel was torpedoed and sunk in Langsetfjorden by Junkers Ju 87 aircraft of the Luftwaffe. She was declared beyond economic repair in summer 1940.
 * HMS Wessex (D43) : World War II: The W-class destroyer was bombed and sunk off Calais, Pas-de-Calais by Luftwaffe aircraft while conducting a naval gunfire support mission.

25 May

 * HMT Charles Boyes : World War II: The naval trawler struck a mine in the North Sea off Caister-on-Sea, Norfolk and sank with the loss of at least fifteen crew.
 * FRENCH LIGHTSHIP Dyck (🇫🇷 France): The lightship sank off Calais, Pas-de-Calais.
 * SS Florentino (🇬🇧 United Kingdom): World War II: The cargo ship was sunk as a blockship at Zeebrugge.
 * SS Joseph Seep (🇵🇦 Panama): World War II: The tanker struck a mine and sank in the English Channel off Le Havre, Seine Maritime, France.
 * FRENCH MINESWEEPER La Jeannine : World War II: The auxiliary minesweeper was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * HMS Mashobra : World War II: Operation Alphabet: The Fleet Air Arm depot ship was bombed off Harstad, Nordland, Norway by Luftwaffe aircraft and beached. She was scuttled on 8 June to prevent her being captured by German forces.
 * ORP Orzeł : World War II: Norwegian Campaign: The Orzeł-class submarine struck a mine and sank in the North Sea (57°N, 3.66667°W) and sank with the loss of all 60 crew.
 * SS Spinel (🇬🇧 United Kingdom): The coaster was bombed and sunk at Dunkerque by Luftwaffe bombing. All nine crew were rescued. She was salvaged by the Germans on 4 July and taken as a prize of war.
 * MV Tennessee (1922) (🇳🇴 Norway): The cargo ship was in collision with SS Baron Fairlie in the North Sea and was beached north west of Copinsay, Orkney Islands, United Kingdom. Salvage attempt were abandoned and she was declared a total loss.
 * SS Transea (🇬🇧 United Kingdom): World War II: The cargo ship was sunk as a blockship at Zeebrugge.
 * FRENCH MINESWEEPER Trombe II : World War II: The auxiliary minesweeper was bombed and sunk at Dunkerque by Luftwaffe aircraft.

26 May

 * SS Ceres (1918) (🇫🇷 France): World War II: The cargo ship was bombed and sunk in the English Channel by Luftwaffe aircraft whilst on a voyage from Rouen, Seine-Maritime to Dunkerque, Nord.
 * HMS Curlew (D42) : World War II: Norwegian Campaign: The C-class cruiser was bombed and sunk in Ofotfjord off Narvik, Nordland, Norway by Junkers Ju 88 aircraft of the Luftwaffe.
 * FRENCH MINESWEEPER Dijonnais : World War II: The auxiliary minesweeper was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * HMS Loch Shin (1930): World War II: Norwegian Campaign: The boom defence vessel was bombed and sunk at Harstad, Norway.
 * RFA Oleander : World War II: The tanker was bombed off Harstad, Norway, by Luftwaffe aircraft and beached. She was scuttled on 8 June to prevent her capture by German forces.
 * SS Saint Camille (🇫🇷 France): World War II: The cargo ship struck a mine and sank in the North Sea off Dunkerque.
 * Vansø (🇳🇴 Norway): World War II: The coaster struck a mine laid by the French submarine Rubis and sank near Stavanger, Rogaland.
 * SS Volkgracht IV (🇧🇪 Belgium): World War II: The dredger struck a mine and sank in the Zeebrugge Canal.

27 May

 * SS Aden (1918) (🇫🇷 France): World War II: The cargo ship was bombed and sunk at Dunkerque, Nord in a Luftwaffe air raid.
 * SS Atlantic Guide (🇬🇧 United Kingdom): World War II: The cargo ship was sunk as a blockship at Zeebrugge, West Flanders, Belgium.
 * SS Borodino (🇬🇧 United Kingdom): World War II: The refrigerated cargo liner was sunk as a blockship at Zeebrugge, West Flanders, Belgium.
 * SS Cap Tafelneh (🇫🇷 France): World War II: The cargo ship was bombed and sunk at Dunkerque in a Luftwaffe air raid. She was refloated on 13 May 1941, repaired and entered German service as Carl Arp.
 * FRENCH MINESWEEPER La Majo : World War II: The auxiliary minesweeper was bombed and sunk in the North Sea off Dunkerque by Luftwaffe aircraft.
 * HMT Ocean Reward : The naval trawler collided with SS Isle of Thanet (🇬🇧 United Kingdom in the English Channel off Dover, Kent and sank with the loss of all hands.
 * MV Øyulf (🇩🇪 Germany): World War II: The cargo ship struck a mine and sank in the North Sea off Haugesund, Rogaland, Norway.
 * SS Sequacity (🇬🇧 United Kingdom): World War II: The coaster was shelled and sunk in the English Channel off Calais, Pas-de-Calais, France (52.07222°N, 1.64333°W) by German shore batteries. All thirteen crew were rescued by SS Yewdale (🇬🇧 United Kingdom).
 * SS Sheaf Mead (🇬🇧 United Kingdom): World War II: Convoy OG 31F: The cargo ship straggled behind the convoy. She was torpedoed and sunk in the Bay of Biscay (43.8°N, -12.63333°W) by GS U-37 (1938) with the loss of 31 of her 38 crew. The survivors were rescued by SS Frangoula B Goulandris (🇬🇷 Greece).
 * SS Uruguay (1921) (🇦🇷 Argentina): World War II: The cargo ship was torpedoed and sunk in the Atlantic Ocean 100 nmi west of Cape Finisterre, Spain (43.66667°N, -12.26667°W) by GS U-37 (1938) with the loss of fifteen of her 28 crew. Survivors were rescued by the trawler Ramoncin (🇪🇸 Spain).
 * SS Worthtown (🇬🇧 United Kingdom): World War II: The coaster was bombed and sunk in the North Sea off Dunkerque by Luftwaffe aircraft. She was later salvaged by the Germans, repaired and entered service as Ilse Schulte.

28 May

 * SS Abukir (🇬🇧 United Kingdom): World War II: Operation Dynamo: The coaster was torpedoed and sunk in the North Sea (51.48333°N, 2.26667°W) by motor torpedo boat S-34 with the loss of 205 of the 231 people on board. The survivors were rescued by HMS Codrington (D65), HMS Jaguar (F34) and HMS Javelin (F61) (all ).
 * MV Blaamannen (🇳🇴 Norway): World War II: The cargo ship struck a mine and sank off Haugesund, Rogaland with the loss of six crew.
 * Boy Roy (🇬🇧 United Kingdom): World War II: Operation Dynamo: The drifter was bombed and damaged at Dunkerque, Nord, France by Luftwaffe aircraft. She was beached and abandoned.
 * MV Brazza (🇫🇷 France): World War II: The passenger ship was torpedoed and sunk off in the Atlantic Ocean (100 nmi off Oporto, Portugal (42.71667°N, -11°W) by GS U-37 (1938) with the loss of 378 of the 575 people on board. Survivors were rescued by HMS Cheshire (F18)  and FRENCH GUNBOAT Enseigne Henry.
 * HMS Brighton Belle (NF17) : World War II: Operation Dynamo: The paddle minesweeper struck a submerged wreck off Dunkerque and sank. All on board were rescued by HMS Medway Queen.
 * SS Carare (🇬🇧 United Kingdom): World War II: The cargo liner struck a mine and sank in the English Channel north of Foreland Point, Devon (51.3°N, -3.73333°W) with the loss of ten of the 126 people on board. The survivors were rescued by HMT Cambridgeshire and HMY Rhodora (both ).
 * Girl Pamela (🇬🇧 United Kingdom: World War II: Operation Dynamo: The drifter collided with another vesssel at Dunkerque and sank.
 * Julien (🇫🇷 France): World War II: The trawler was shelled and sunk in the Atlantic Ocean off Cape Finisterre, Spain (42.83333°N, -10.66667°W) by GS U-37 (1938) (. All ten crew were rescued.
 * FRENCH MINESWEEPER Marguerite Rose : World War II: Operation Dynamo: The auxiliary minesweeper was bombed and sunk in the North Sea off Dunkerque by Luftwaffe aircraft.
 * HMT Ocean Reward : The naval trawler collided with SS Isle of Thanet (🇬🇧 United Kingdom) in the English Channel off Dover, Kent and sank with the loss of one crew member.
 * Paxton (🇬🇧 United Kingdom): World War II: Operation Dynamo: The drifter was bombed and damaged at Dunkerque, Nord by Luftwaffe aircraft. She was beached and abandoned.
 * MV Queen of the Channel (🇬🇧 United Kingdom): World War II: Operation Dynamo: The passenger ship was bombed and sunk in the North Sea off Dunkerque (51.25°N, 2.66667°W) by Luftwaffe aircraft. All 920-plus people on board were rescued by SS Dorrien Rose (🇬🇧 United Kingdom).
 * HMT Thomas Bartlett (FY 533) : World War II: Operation Dynamo: The naval trawler struck a mine in the English Channel off Calais, Pas-de-Calais, France and sank with the loss of eight crew.
 * HMT Thuringia (FY 106) : World War II: Operation Dynamo: The naval trawler struck a mine in the North Sea off the Belgian coast and sank. Only four crew survived.
 * SS Torsten (🇸🇪 Sweden): World War II: The cargo ship struck a mine and sank in the Kattegat (57.55°N, 11.58333°W). All sixteen crew were rescued.

29 May

 * HMS Bideford (L43) : World War II: Operation Dynamo: The Shoreham-class sloop was bombed and severely damaged at Dunkerque, Nord, France. She was beached to prevent her sinking. Seventeen crew were lost. The survivors were rescued by HMS Kellet . She was later refloated and towed by HMS Locust (T28) which was later relieved by ST Gondia and ST Simla (both 🇬🇧 United Kingdom), arriving at Dover on 31 May. HMS Bideford was subsequently repaired and returned to service.
 * HMT Calvi (FY 715) : World War II: Operation Dynamo: The naval trawler was bombed and sunk at Dunkerque with the loss of three crew. The survivors were rescued by HMT John Cattling (.
 * SS Clan MacAlister (1930) (🇬🇧 United Kingdom): World War II: Operation Dynamo: The cargo ship was bombed and sunk off Dunkerque, Nord, France by Luftwaffe aircraft with the loss of eighteen lives. The survivors were rescued by HMS Malcolm (D19) and HMT Pangbourne (both ).
 * Comfort (🇬🇧 United Kingdom): World War II: The drifter was rammed and sunk by HMS Leda (J93) which mistook her for an E-boat. Four of her six crew were lost.
 * HMS Crested Eagle : World War II: Operation Dynamo: The auxiliary anti-aircraft ship was bombed and sunk off Dunkerque by Luftwaffe aircraft. The survivors were rescued by HMT Pangbourne.
 * SS Douaisien (🇫🇷 France): World War II: Operation Dynamo: The cargo ship was bombed and severely damaged in the North Sea off Dunkerque. She was subsequently bombed and sunk on 1 June.
 * SS Fenella (1936) (🇬🇧 United Kingdom): World War II: Operation Dynamo: The passenger ship was bombed and damaged off Dunkerque by Luftwaffe aircraft with the loss of fifteen crew. She sank the next day.
 * HMS Gracie Fields : World War II: Operation Dynamo: The paddle minesweeper was bombed and sunk in the North Sea off Dunkerque by Luftwaffe aircraft with the loss of one crew member. The survivors were rescued by HMT Pangbourne.
 * HMS Grafton (H89) : World War II: Operation Dynamo: The G-class destroyer was torpedoed and damaged in the North Sea off Nieuwpoort, West Flanders, Belgium (51.36667°N, 2.75°W) by GS U-62 (1939) with the loss of four of her 146 crew. She was subsequently scuttled by HMS Ivanhoe (D16).
 * HMS Grenade (H86) : World War II: Operation Dynamo: The G-class destroyer was bombed and sunk at Dunkerque by Junkers Ju 87 aircraft of the Luftwaffe with the loss of eighteen of her 146 crew.
 * FRENCH MINESWEEPER Joseph Marie : World War II: Operation Dynamo: The auxiliary minesweeper was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * SS Lorina (🇬🇧 United Kingdom): World War II: Operation Dynamo: The passenger ship was bombed and sunk off Dunkerque by Luftwaffe aircraft with the loss of eight crew.
 * SS Marie José (🇫🇷 France): World War II: The cargo ship was torpedoed, shelled and sunk in the Atlantic Ocean 40 nmi north west of Vigo, Spain by GS U-37 (1938).
 * SS Mars (🇫🇷 France): World War II: Operation Dynamo: The coaster was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * ST Max (🇧🇪 Belgium): World War II: Operation Dynamo: The tug was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * TSS Mona's Queen (🇬🇧 United Kingdom): World War II: Operation Dynamo: The ferry was bombed and sunk off Dunkerque with the loss of 26 lives. The survivors were rescued by HMS Vanquisher (1917).
 * SS Monique Schiaffino (🇫🇷 France): World War II: Operation Dynamo: The cargo ship was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * HMS Montrose (1918) : The Scott-class destroyer collided with ST Sun V (🇬🇧 United Kingdom) in the English Channel off Cap Griz Nez, Pas-de-Calais, France and was severely damaged. She was beached to prevent her sinking. Later refloated and towed back to Dover, Kent by ST Lady Brassey and ST Simla (both 🇬🇧 United Kingdom).
 * Nautilus (🇬🇧 United Kingdom): World War II: Operation Dynamo: The drifter was sunk in the North Sea off Dunkerque due to enemy action.
 * HMT Polly Johnson : World War II: Operation Dynamo: The naval trawler was bombed and severely damaged in the North Sea off Dunkerque by Luftwaffe aircraft with the loss of one crew member. She was later scuttled.
 * FRENCH TUG Samson : World War II: The tug struck a mine in the Mediterranean Sea and sank off the coast of Gard.
 * SS Saint-Clair (🇫🇷 France): World War II: The cargo ship was bombed and sunk in Tjeldsundet, Norway by Luftwaffe aircraft.
 * SS St Octave (🇫🇷 France): World War II: The cargo ship was scuttled at Dunkerque. She was later salvaged by the Germans, repaired and entered service as Ilse Fritzen.
 * MV Telena (🇬🇧 United Kingdom): World War II: The tanker was shelled and set on fire in the Atlantic Ocean off Muros, A Coruña, Spain (42.41667°N, -9.13333°W) by GS U-37 (1938) . She was beached and abandoned by her crew. Eighteen of her 36 crew were killed, the survivors were rescued by the trawlers Buena Esperanza and Jose Ignacio de C. (both 🇪🇸 Spain). She was later seized by Spain, towed to Vigo, Galicia where her cargo was salvaged and then towed to Bilbao, Biscay for repairs. Entered Spanish service as Gerona.
 * GERMAN AUXILIARY PATROL BOAT VP-1109 : The vorpostenboot struck a mine and sank in thye North Sea off Haugesund, Nordland, Norway (62.96667°N, 6.8°W).
 * ST Vulcain (🇧🇪 Belgium): World War II: Operation Dynamo: The tug was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * HMS Wakeful (H88) : World War II: Operation Dynamo: The W-class destroyer was torpedoed and sunk in the North Sea (51.33333°N, 2.75°W) by E-boat S-30 with the loss of 724 of the 750 people on board. The survivors were rescued by the drifters Comfort and Nautilus (both 🇬🇧 United Kingdom) as well as HMS Grafton (H89) and HMT Gossamer (both ).
 * HMS Waverley : World War II: Operation Dynamo: The paddle minesweeper was bombed and sunk at Dunkerque by Luftwaffe aircraft with the loss of some 360 people. The survivors were rescued by FRENCH DESTROYER Cyclone, HMS Golden Eagle , two drifters and a tug.

30 May

 * Bourrasque : World War II: Operation Dynamo: The Bourrasque-class destroyer struck a mine off Nieuwpoort, West Flanders, Belgium and was severely damaged. She was then sunk by German artillery fire.
 * HMT Cambrian : World War II: The boom defence vessel struck a mine in the Solent off Spithead, Hampshire and sank with the loss of two crew.
 * SS Finkenau (🇩🇪 Germany): World War II: The coaster struck a mine and sank in the Kattegat off Drogden, Norway.
 * HMS King Orry : World War II: Operation Dynamo: The armed boarding vessel was shelled and sunk off Dunkerque, Nord, France. The survivors were rescued by HMT Lord Grey. HMT Vivacious (both ) and other small boats.
 * SS Normannia (🇬🇧 United Kingdom): World War II: Operation Dynamo: The passenger ship was bombed and severely damaged in the North Sea 4 nmi off Dunkerque by Heinkel aircraft of the Luftwaffe. She was beached and abandoned.
 * SS Stanhall (🇬🇧 United Kingdom): World War II: The cargo ship was torpedoed and sunk in the English Channel south of The Lizard, Cornwall (48.98333°N, -5.28333°W) by GS U-101 (1940) with the loss of one of her 37 crew. The survivors were rescued by SS Temple Moat (🇬🇧 United Kingdom).
 * GERMAN PATROL BOAT V-1109 : World War II: The vorpostenboot was torpedoed and sunk off the coast of Norway by HMS Narwhal (N45).

31 May

 * Adjader (🇫🇷 France): World War II: Operation Dynamo: The trawler was bombed and sunk at Dunkerque, Nord by Luftwaffe aircraft.
 * SS Aïn el Turk (🇫🇷 France): World War II: Operation Dynamo: The cargo ship was bombed and sunk off Dunkerque by Luftwaffe aircraft.
 * Costaud (🇫🇷 France): World War II: Operation Dynamo: The trawler was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * SS Côte d'Azur (🇫🇷 France): World War II: Operation Dynamo: The cargo ship was bombed and sunk at Dunkerque by Luftwaffe aircraft. She was later salvaged by the Germans, repaired and entered service as Elsass.
 * HMS Devonia : World War II: Operation Dynamo: The minesweeper was bombed and severely damaged off Dunkerque. She was beached and abandoned at La Panne, West Flanders, Belgium.
 * HMS Grive : World War II: Operation Dynamo: The Fleet Air Arm tender was bombed and damaged at Dunkerque by Luftwaffe aircraft. She then struck a mine and sank with the loss of all crew.
 * SS Jadarland (🇳🇴 Norway): World War II: The cargo liner struck a mine and sank off Slettå, Førlandsvågen. with the loss of nineteen lives.
 * SS Orangemoor (🇬🇧 United Kingdom): World War II: Convoy HGF 31: The cargo ship was torpedoed and sunk in the English Channel south of Start Point, Devon (49.88333°N, -3.38333°W) by GS U-101 (1940) ( with the loss of eighteen of her 40 crew. The survivors were rescued by SS Brandenburg (🇬🇧 United Kingdom).
 * Puissant (🇫🇷 France): World War II: Operation Dynamo: The trawler was bombed and sunk at Dunkerque by Luftwaffe aircraft.
 * Sirocco : World War II: Operation Dynamo: The Bourrasque-class destroyer was torpedoed and sunk in the North Sea (51.3°N, 2.25°W) by S-23 and S-26 (both ) with the loss of over 660 lives.
 * HMT St Achillaeus : World War II: Operation Dynamo: The naval trawler struck a mine and sank in the North Sea off Dunkerque with the loss of one crewmember.
 * GS U-13 (1935) : World War II: The Type IIB submarine was depth charged and sunk in the North Sea 14 nmi south-east of Lowestoft, Suffolk, United Kingdom (52.45°N, 2.03333°W) by HMS Weston (L72) . All crew were rescued and made prisoners of war.

Unknown date

 * Ruytingen Lightship (🇫🇷 France): World War II: The lightship was bombed and sunk in the North Sea off Dunkerque.