List of shipwrecks in August 1917

The list of shipwrecks in August 1917 includes some ships sunk, foundered, grounded, or otherwise lost during August 1917.

1 August

 * MV Alcyon (1893) ( undefined): World War I: The coaster was shelled and sunk in the English Channel 45 nmi north north west of the Roches-Douvres Lighthouse, Côtes-du-Nord, France by SMU UB-31 . Her crew survived.
 *  Alexandre (🇫🇷 France): World War I: The four-masted barque was scuttled in the Atlantic Ocean 400 nmi north of the Azores, Portugal (33.55°N, -23.25°W) by SMU U-155 . Her crew survived.
 * SS Karina (1905) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Irish Sea 17 nmi south south west of Hook Point, County Waterford by SMU UC-75 with the loss of eleven lives.
 * SS Laertes (1904) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 1.25 nmi south of Prawle Point, Devon by SMU UB-31 with the loss of fourteen of her crew.
 * SS Llandudno (1910) ( undefined): World War I: The cargo ship was scuttled in the Mediterranean Sea 110 nmi west by north of Porquerolles, Var, France by SMU U-33 (Germany) with the loss of a crew member.
 * HMT Nina : The naval trawlers truck a mine and sank in the English Channel off Prawle Point with some loss of life.
 * JAPANESE CRUISER Otowa : The protected cruiser ran aground off Daiō, Mie (34.23333°N, 136.58333°W). She sank on 10 August.
 * SS Rokeby (1899) ( undefined): World War I: The cargo ship struck a mine and sank in the Mediterranean Sea 1.5 nmi south west of Porquerolles. Her crew survived.

2 August
For the sinking of the Danish cargo ship Odense on this date, see the entry for 5 May 1917
 * USS Arvilla (SP-752) : The patrol boat collided with the fishing vessel Higo (🇺🇸 United States) at San Diego, California and sank. She was later raised, repaired and returned to service.
 * HMS Ermine : World War I: The fleet messenger struck a mine and sank in the Aegean Sea (40.65°N, 23.56667°W) with the loss of 24 of her crew.
 * SS Libia (1889) (🇫🇷 France): World War I: The cargo ship was sunk in the Atlantic Ocean 70 nmi west of Penmarc'h, Finistère (47.81667°N, -5.91667°W) by SMU U-61 with the loss of 24 crew.
 *  Marthe (🇫🇷 France): World War I: The barque was scuttled in the Atlantic Ocean south south east of the Azores, Portugal (33.63333°N, -23.5°W) by SMU U-155 with the loss of a crew member.
 * SS Newlyn (1913) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 2 nmi south of Prawle Point, Devon by SMU UB-31 with the loss of four of her crew.
 * SMS Seeadler (auxiliary cruiser) : The auxiliary cruiser was wrecked on Maupihaa, French Polynesia. Her crew survived.
 * SS Teesdale (1913) ( undefined): The cargo ship foundered in the North Sea 3 nmi north of Saltburn-by-the-Sea, Yorkshire.
 * Young Bert ( undefined): World War I: The fishing vessel was scuttled in the North Sea off the mouth of the Humber by SMU UC-63 with the loss of all hands.

3 August

 * SS Aube (1916) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 3.5 nmi north west of the Île d'Yeu, Vendée, France (46.93333°N, -2.46667°W) by SMU UC-71 with the loss of one of her 30 crew. Survivors were rescued by FRENCH PATROL BOAT Bouvreuil.
 * SS Beechpark (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 4 nmi south of St Mary's, Isles of Scilly (49.85°N, -6.28333°W) by SMU UC-75 . Her crew survived.
 * SS Halldor (1896) (🇳🇴 Norway): World War I: The cargo ship was scuttled in the Atlantic Ocean 90 nmi west of Gibraltar (36.96667°N, -6.85°W) by SMU U-39 . Her crew survived.
 * SS Hornchurch (1916) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea 3.5 nmi north east of Coquet Island, Northumberland with the loss of two of her crew.
 * Renée Marthe (🇫🇷 France): World War I: The sailing vessel was sunk in the English Channel west of Prawle Point, Devon, United Kingdom by SMU UB-31.
 * San Nicola ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea by SMU UC-22.

4 August

 *  Angelina T. ( undefined): World War I: The brigantine was shelled and sunk in the Mediterranean Sea north of Cape Corse, Corsica, France (42.68333°N, 10.06667°W) by SMU U-33 (Germany).
 * SS Azira (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 6 nmi south east of Seaham, County Durham by SMU UB-22 with the loss of a crew member.
 * SS British Monarch (1913) ( undefined): World War I: The cargo ship struck a mine and sank in the Mediterranean Sea 2 nmi south south west of Porquerolles, Var, France. Her crew survived.
 * SS Cairnstrath (1888) ( undefined): World War I: the cargo ship was torpedoed and sunk in the Bay of Biscay 6 nmi south south west of the Île du Pilier, Vendée, France (47°N, -2.48333°W) by SMU UC-71 with the loss of 22 of her 23 crew. The survivor was rescuted by ST Victoire (🇫🇷 France).
 * SS Countess of Mar (1916) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 55 nmi north of Bayonne, Pyrénées-Atlantiques, France (44.45°N, -1.8°W) by SMU U-61 with the loss of twenty crew.
 * SMU UC-44 : World War I: The Type UC II submarine was sunk by one of her own mines off the coast of Ireland (52.11667°N, -6.98333°W) with the loss of all 26 crew. The wreck was raised in September 1917 and scrapped.

5 August

 * HMT Bovic : The naval trawler was lost on this date.
 * HMS Bracondale : World War I: The Q-ship was damaged in the Atlantic Ocean 120 nmi north west of Tory Island, County Donegal by SMU U-44 with the loss of a crew member. She was taken in tow, but sank on 7 August.
 * Campo Libre (🇪🇸 Spain): World War I: The fishing vessel was sunk in the Bay of Biscay 40 nmi off Bilbao, Biscay (44.16667°N, -2.75°W) by SMU U-61.
 * SS Kathleen (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 90 nmi west of the Skellig Islands, County Kerry (52.16667°N, -12.33333°W) by SMU U-100 with the loss of a crew member.
 * SS Ryton (1913) ( undefined): World War I: The cargo ship rammed SMU U-39 in the Atlantic Ocean (35.95°N, -7.11667°W) and sank due to damage received. Her crew survived.
 * SS Sauternes (1900) (🇫🇷 France): World War I: The coaster was sunk in the Bay of Biscay 9 nmi off Cap Ferrat, Alpes-Maritimes by SMU U-61.

6 August

 * Alfred (🇫🇷 France): World War I: The sailing vessel was sunk in the North Sea off Dunquerque, Nord by SMU UC-63.
 * SS Argalia (1903) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 81 nmi north west by west of Tory Island, County Donegal by SMU U-94 with the loss of three of her crew.
 * SS Baysoto (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 33 nmi south east by east of Girdleness, Aberdeenshire (56.96667°N, -1.83333°W) by SMU UC-42 . Her crew survived.
 * SS Campana (1901) (🇺🇸 United States): World War I: The tanker was sunk in the Atlantic Ocean 143 nmi off the Île de Ré, Charente Maritime, France (46.13333°N, -5.5°W) by SMU U-61 . Six survivors were taken as prisoners of war.
 * El Kaddra Nr. 53 (Flag of French Tunisia.svg Tunisia): World War I: The boat was sunk in the Mediterranean Sea by SMU UC-27.
 * SS Eugenia (1906) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 7.5 nmi west north west of the Fastnet Rock by SMU U-55 . Her crew survived.
 * SS Fane (1901) (🇳🇴 Norway): World War I: The cargo ship struck a mine and sank in the North Sea off the Inner Dowsing Lightship ( undefined) (53.35°N, 0.63333°W) with the loss of four of her crew.
 *  Jenny (🇩🇰 Denmark): World War I: The brig was scuttled in the North Sea 25 nmi east north east of Hartlepool, County Durham, United Kingdom (54.91667°N, -0.88333°W) by SMU UB-22 . Her crew survived.
 * SS Matunga ( undefined): World War I: The cargo ship was scuttled in the Pacific Ocean 300 nmi east of Riche Island, New Guinea by SMS Wolf (auxiliary cruiser).
 * Narcissus ( undefined): World War I: The drifter was scuttled in the North Sea 12 nmi south east of the mouth of the River Tyne (54.91667°N, -1.08333°W) by SMU UB-22 . Her crew survived.
 * SS Polanna (1893) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 3 nmi east of Whitby, Yorkshire by SMU UC-40 with the loss of two of her crew.
 * SS Rosemount (1905) ( undefined): The cargo ship was torpedoed and sunk in the North Sea 45 nmi north east by north of Muckle Flugga, Shetland Islands by SMU U-101 with the loss of a crew member.
 * SS Talisman (1882) ( undefined): The cargo ship was scuttled in the North Sea 7 nmi east south east of Hartlepool (54.73333°N, -1.16667°W) by SMU UB-41 . Her crew survived.

7 August

 * SS Blesvig ( undefined): The cargo ship collided with another vessel and sank.
 *  Christiane (🇺🇸 United States): World War I: The barque was scuttled in the Atlantic Ocean 200 nmi east of São Miguel Island, Azores, Portugal (37.66667°N, -20.66667°W) by SMU U-155 . Her crew survived.
 * SS Esemplare (1902) ( undefined): World War I: The cargo ship was sunk in the Mediterranean Sea (35°N, 1.61667°W) by SMU UC-27.
 * SS Iran (1896) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nmi east south east of Santa Maria Island, Azores by SMU U-155 . Her crew survived.
 * SS Jarl (1882) (🇸🇪 Sweden): World War I: The cargo ship was sunk in the Atlantic Ocean 130 nmi south west of the Faroe Islands (59.75°N, -9.46667°W) by SMU U-22 (Germany) . Her crew survived.
 * SS Onesta (1896) ( undefined): World War I: The cargo ship was sunk in the North Sea off the Inner Dowsing Lightship ( undefined) by SMU UC-63 . Her crew survived.
 * SS Othalia (1880) (🇸🇪 Sweden): World War I: The cargo ship was torpedoed and damaged in the North Sea 50 nmi east of the Orkney Islands, United Kingdom (59°N, -0.96667°W) by SMU UC-30 . Othalia was towed in to Kirkwall where she was declared a constructive total loss. Subsequently fitted with a new stern section and returned to service.
 * SS Port Curtis (1910) ( undefined): World War I: The cargo ship was scuttled in the Atlantic Ocean 70 nmi west of Penmarc'h, Finistère, France (47.5°N, -6°W) by SMU UC-71 . Her crew survived.
 * SS Trento (1899) ( undefined): World War I: The cargo ship was captured and scuttled in the Atlantic Ocean 150 nmi west north west of Ouessant, Finistère by SMU U-61.

8 August

 * SS Berlengas (1901) (🇵🇹 Portugal): World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 90 nmi south west of Ouessant, Finistère, France (47°N, -5.25°W) by SM UC-77.
 * SS Breton (1886) (🇫🇷 France): World War I: The cargo ship was sunk in the Mediterranean Sea (37.5°N, 9.31667°W) by SMU UC-37 . Her crew survived.
 * George A. Marsh 🇺🇸 United States): The schooner sank in Lake Ontario during a storm with the loss of twelve lives
 * HMS Dunraven (: World War I: The Q-ship was torpedoed and shelled in the Bay of Biscay off Ouessant, Finistère, France by SMU UC-71 with the loss of a crew member. Survivors were rescued by HMS Christopher . HMS Dunraven sank on 10 August.
 * SS Llanishen (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 8 nmi north by east of Cape Creus, Spain 42.41667°N, 3.33333°W) by SMU U-33 (Germany) with the loss of two crew.
 * Marie Jesus Protegez Nous (🇫🇷 France): World War I: The sailing vessel was sunk in the North Sea off Lowestoft, Suffolk, United Kingdom by SMU UC-63.

9 August

 * SS Agne (1894) (🇸🇪 Sweden): World War I: The cargo ship was sunk in the North Sea (60.76667°N, 3.53333°W) by SMU U-60 . Her crew survived.
 * Alfonso ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea (37.41667°N, 12.08333°W) by SMU UC-35.
 * SS Blagdon (1893) ( undefined): World War I: The cargo ship was torpedoed and damaged in the North Sea 75 nmi east by south of Muckle Flugga, Shetland Islands by SMU U-78 with the loss of twelve of her crew. She was abandoned by the survivors and was later sunk by SMU U-100.
 * SS Export (1902) ( undefined): World War I: The cargo ship was sunk in the North Sea 45 nmi west of Sognefjord, Norway by SMU U-60 . Her crew survived.
 * Flora ( undefined): World War I: The sailing vessel was sunk in the Gulf of Lyons by SMU U-33 (Germany).
 * Industria (🇪🇸 Spain): World War I: The sailing vessel was sunk in the Gulf of Lyons by SMU U-33 (Germany).
 * ST Jack ( undefined): The tug was wrecked on the Bondicarr Rocks, in the North Sea off Amble, Northumberland.
 * Jeanne (🇫🇷 France): The cargo ship collided with a Norwegian merchant vessel and sank. Her crew were rescued.
 * HMS Recruit (1916) : World War I: The R-class destroyer struck a mine and sank in the North Sea with some loss of life.
 * S. Gerlano ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea (37.41667°N, 12.08333°W) by SMU UC-35 . Her crew survived.

10 August

 * SS Capella I (1899) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 130 nmi west of Galway, United Kingdom by SMU U-86 . Her crew survived.
 * SS Lealta (1888) ( undefined): World War I: The cargo ship was sunk in the Ionian Sea (35.75°N, 16.08333°W) by SMU U-31 (Austria-Hungary) . Her crew survived.
 * Margherita ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea by SMU UC-53.
 * Orion I (🇳🇴 Norway): World War I: The auxiliary sailing vessel was scuttled in the North Sea 30 nmi off Peterhead, Aberdeenshire, United Kingdom (57.7°N, -0.75°W) by SMU U-62 . Her crew survived.
 * Solglimt (🇳🇴 Norway): World War I: The sailing vessel was sunk in the Atlantic Ocean 61.73333°N, -3.08333°W) by SMU U-75 . Her crew survived.
 * SS Tito Speri (1910) ( undefined): World War I: The cargo ship was sunk in the Tyrrhenian Sea off Cape Palinuro, Campania (40.01667°N, 15.18333°W) by SMU UC-53 . She was beached at Pisciotto but was declared a constructive total loss.
 * SS War Patrol (1917) ( undefined): World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 1 nmi west of Penmarc'h, Finistère, France (47.8°N, -4.41667°W) with the loss of fourteen of her 26 crew. Survivors were rescued by FRENCH TRAWLER Taureau.

11 August

 * SS City of Athens (1901) ( undefined): World War I: The passenger ship struck a mine and sank off Cape Town, South Africa with the loss of nineteen of the 213 people on board.
 * Gloriosa ( undefined): World War I: The fishing smack was scuttled in the Irish Sea 12 nmi north by east of Caldey Island, Pembrokeshire by SMU UC-51 . Her crew survived.
 * SS Holar (1893) (🇩🇰 Denmark): World War I: The coaster was torpedoed and sunk in the North Sea 3 nmi off Lerwick, Shetland Islands, United Kingdom by SMU UC-30 with the loss of a crew member.
 * HMT Jay : World War I: The naval trawler was torpedoed and sunk in the North Sea off Southwold, Suffolk (55.31667°N, 1.81667°W) by SMU UB-35 with the loss of nine of her crew.
 * SS Sonnie (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 5 nmi north west of teh Le Four Lighthouse, Ouessant, Finistère, France (48.56667°N, -4.91667°W) by SMU UC-77 with the loss of eleven of her crew.

12 August

 *  Ansedonia ( undefined): World War I: The barquentine was scuttled in the Tyrrhenian Sea (39.4°N, 15.58333°W) by SMU UC-53 . Her crew survived.
 * Ardita Carrara ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea south of Naples by SMU UC-53 . Her crew survived.
 * SS Bestum (1895) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 150 nmi west of the Bishop Rock, Isles of Scilly by SMU U-93 . Her crew survived.
 * SS Bogatyr (1906) (🇩🇰 Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea (57.06667°N, -1.06667°W) by SMU UC-30 . Her crew survived.
 * SS Cumberland (1915) ( undefined): The passenger ship foundered in the Bass Strait.
 * HMT Dewey : The naval trawler was lost on this date.
 * Eleazar ( undefined): World War I: The fishing vessel was shelled and sunk in the Irish Sea 25 nmi south west by west of St. Ann's Head, Pembrokeshire by SMU UC-51 . Her crew survived.
 * SS Falkland (1897) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 10 nmi south by east of Mine Head, Cornwall by SMU U-55 with the loss of ten crew.
 * RUSSIAN DESTROYER Leitenant Burakov (: World War I: The former Leitenant Burakov-class destroyer), operating as a despatch vessel, struck a mine and sank in the Baltic Sea off the Åland Islands, Sweden.
 * SS Lynorta (1902) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 102 nmi north west by north of Tory Island, County Donegal (56.41667°N, -10.5°W) by SMU U-94 with the loss of two of here crew.
 *  Marie Alfred (🇫🇷 France): World War I: The brigantine was sunk in the Atlantic Ocean north of Ouessant, Finistère by SMU UB-40.
 *  Pauline Louisa (🇫🇷 France): World War I: The schooner was shelled and sunk in the English Channel north east of Ouessant (48.68333°N, -4.65°W) by SMU UB-40 . Her crew survived.
 * SS Roanoake (1907) ( undefined): World War I: The cargo ship was scuttled in the Atlantic Ocean 100 nmi west of the Butt of Lewis, Outer Hebrides (58.65°N, -9.13333°W) by SMU UB-48 . Her crew survived.
 * SMU U-44 : World War I: The Type U 43 submarine was rammed and sunk in the North Sea south of Norway (58.83333°N, 4.33333°W) by HMS Oracle (1915) with the loss of all 44 crew.
 *  Ursus Minor (🇳🇴 Norway): World War I: The barque was sunk in the Atlantic Ocean 200 nmi west of Ireland (55.48333°N, -15.55°W) by SMU U-84 . Her crew survived.

13 August

 * SS Akassa (1910) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 8 nmi south east of Galley Head, County Cork (51.38333°N, -8.78333°W) by SMU UC-33 with the loss of seven lives.
 * Arcangelo Michele ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea south of Naples by SMU UC-53.
 * HMS Bergamot (1917) : World War I: The Anchusa-class sloop, operating as a Q-ship, was torpedoed and sunk in the Atlantic Ocean 70 nmi off Killybegs, County Donegal (55.21667°N, -10.28333°W) by SMU U-84 with the loss of fourteen of her 93 crew.
 *  Emilie Galline (🇫🇷 France): World War I: The barque was sunk in the English Channel 25 nmi south south west of Start Point, Devon, United Kingdom (49.96667°N, -4.05°W) by SMU UC-79 with the loss of a crew member.
 * Il Nuovo Leonardo ( undefined): World War I: The sailing vessel was sunk in the Tyrrhenian Sea south of Naples by SMU UC-53.
 * SS Maston (1912) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 35 nmi east north east of Cape Spartivento, Calabria, Italy (38.41667°N, 16.71667°W) by SMU U-28 (Austria-Hungary) with the loss of two of her crew.
 * SS Turakina (1902) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 120 nmi west south west of the Bishop Rock, Isles of Scilly (48.5°N, -8.56667°W) by SMU U-86 with the loss of two of her crew.

14 August

 * SS Asti (1896) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 220 nmi west if the Isles of Scilly, United Kingdom (48.25°N, -10.25°W) by SMU U-93 . Her crew survived.
 * SS Costanza (1883) ( undefined): World War I: The cargo ship struck a mine and sank in the North Sea 3.5 nmi south east by east of the Inner Dowsing Lightship ( undefined) by SMU UC-63 . Her crew survived.
 * Jane S. ( undefined): World War I: The fishing vessel struck a mine and sank in the North Sea 11 nmi south east of St Abb's Head, Berwickshire.
 *  Julita (🇪🇸 Spain): World War I: The barque was sunk in the Mediterranean Sea 35 nmi off Alexandria, Egypt by SMU UC-22.
 * SS Eugenia (1902) ( undefined): World War I: The cargo ship was sunk in the Mediterranean Sea 20 nmi north of Cape Serrat, Tunisia (37.2°N, 10.33333°W) by SMU UC-67.
 * SS Luna (1911) (🇳🇴 Norway): World War I: The coaster was damaged in the North Sea 16 to 18 nmi north of the Humber Lightship by SMU UC-63 . She was beached at Cleethorpes, Lincolnshire, United Kingdom but was later refloated.
 *  Majorka (🇳🇴 Norway): World War I: The full-rigged ship struck a mine and sank in the North Sea north of Scotland (58.56667°N, -5.23333°W). Her crew survived.
 * SS N. Verbeckmoens (1890) (🇳🇱 Netherlands): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean off Trevose Head, Cornwall, United Kingdom (50.78333°N, -4.75°W) by SMU UC-51 with the loss of four of her crew.
 * HMS Prize (1901) : World War I: The Q-ship was torpedoed and sunk in the Atlantic Ocean north west of Ireland by SMU UB-48 with the loss of all 27 crew.
 * SS Thames (1910) ( undefined): World War I: The coaster was shelled and sunk in the North Sea (53.7°N, 0.4°W) by SMU UC-63 with the loss of all ten crew.
 * SS Tuddal (1895) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 150 nmi south west of Ouessant, Finistère, France (46.75°N, -7°W) by SMU UB-40 . Her crew survived.
 * SS Umberto I (1878) : World War I: The armed merchant cruiser was torpedoed and sunk in the Ligurian Sea off Gallinara (44.06667°N, 8.25°W) by SMU UC-35 with the loss of 26 of her crew.
 * SS Wisbech (1901) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 12 nmi off Trevose Head by SMU UC-51 with the loss of two of her crew.

15 August

 *  Albertha (🇩🇰 Denmark): World War I: The three-masted schooner was shelled and sunk in the Atlantic Ocean north west of the Hebrides, United Kingdom (57°N, -9.9°W) by SMU U-62 . Her crew survived.
 * Alice ( undefined): World War I: The fishing vessel was scuttled in the North Sea off the mouth of the Humber (53.63333°N, 0.91667°W) by SMU UC-63 with the loss of all five crew.
 * SS Bandai Maru (1890) (🇯🇵 Japan): World War I: The cargo ship was shelled in the Mediterranean Sea north east of Cape Bon, Tunisia (37.33333°N, 11.53333°W) by SMU U-33 (Germany) . She was consequently scuttled.
 * SS Brodstone (1896) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 95 nmi west of Ouessant, Finistère, France (47.83333°N, -7.33333°W) by SMU UB-40 with the loss of five of her crew.
 * HMT Ethel & Millie : World War I: The fishing smack, operating as a Q-ship under the name Boy Alfred was scuttled in the North Sea off the mouth of the Humber by SMU UC-63 with the loss of all seven crew.
 * HMT G & E : World War I: The fishing smack, operating as a Q-ship under the name Nelson was shelled and sunk in the North Sea off the mouth of the Humber by SMU UC-63 with the loss of a crew member.
 * SS Hylas (1899) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 10 nmi east of the Butt of Lewis (58.65°N, -5.81667°W) by SMU U-80 . Her crew survived.
 * Nelson ( undefined): World War I: The fishing vessel was sunk by UC-41.
 * SS Phoebe (1912) (🇫🇷 France): World War I: The cargo ship struck a mine and sank in the Bay of Biscay south by west of Penmarc'h, Finistère (47.8°N, -4.41667°W). Her crew were rescued by FRENCH TRAWLER Tauron.

16 August

 * SMS A13 : World War I: The A1-class torpedo boat was bombed and sunk at Ostend, West Flanders, Belgium by a British Handley Page O/100 aircraft.
 * SS Athenia (1904) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 7 nmi north of Inishtrahull Island, County Donegal (55.55°N, -7.38333°W) by SMU U-53 with the loss of fifteen lives.
 * HMS Bradford City : World War I: The Q-ship was sunk in the Strait of Messina (38.16667°N, 15.6°W) by SMU U-28 (Austria-Hungary) . Her crew survived.
 *  Caroline Kock (🇩🇰 Denmark): World War I: The three-masted schooner was shelled and sunk in the Atlantic Ocean west of the Hebrides, United Kingdom by SMU U-80 ( with the loss of a crew member.
 * SS Delphic ( undefined): World War I: The ocean liner was torpedoed and sunk in the Atlantic Ocean 135 nmi south west by west of the Bishop Rock, Isles of Scilly (48.5°N, -9.16667°W) by SMU UC-72 with the loss of five lives.
 * SS Eastgate (1915) ( undefined): World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean 120 nmi south west by west of the Bishop Rock, Isles of Scilly by SMU UB-40 . She was beached by was later refloated.
 * SS Manchester Engineer (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 4.5 nmi south east of Flamborough Head, Yorkshire by SMU UC-16 . Her crew survived.
 * SS Palatine (1888) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 10 nmi west north west of Canna, Inner Hebrides by SMU U-75 . Her crew survived, but her captain was taken as a prisoner of war.
 * SS Svanholm (1905) (🇩🇰 Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea by SMU U-94 . Her crew survived.

17 August

 * SS Edina (1865) ( undefined): World War I: The coaster was shelled and sunk in the Atlantic Ocean 30 nmi south east of Stóra Dímun, Faroe Islands by SMU U-55 . Her crew survived.
 * Esperance (🇫🇷 France): World War I: The trawler struck a mine and sank in the English Channel off Le Tréport, Seine-Maritime with the loss of ten of her crew.
 * Lorenz Aiello ( undefined): World War I: The sailing vessel was sunk in the Ligurian Sea off Sanremo, Liguria by SMU UC-35.
 * SS Meuse II (1916) (🇫🇷 France): World War I: The tanker was sunk in the Atlantic Ocean 140 nmi south west of Ouessant, Finistère by SMU UC-72.
 * SS Pontoporos (1913) (🇬🇷 Greece): World War I: The cargo ship was sunk in the Bay of Biscay off the Glénan Islands, Finistère (47.55°N, -3.25°W) by SMU UC-21.
 * Susie ( undefined): World War I: The fishing ketch was shelled and sunk in the North Sea 10 nmi north east by east of Scarborough, Yorkshire by SMU UC-16 with the loss of a crew member.

18 August

 * SS Ardens (1878) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 2 nmi east of Filey, Yorkshire by SMU UC-16 with the loss of a crew member.
 * HMT Benjamin Stevenson : World War I: The naval trawler was shelled and sunk in the North Sea 40 nmi east of Fetlar, Shetland Islands by SMU U-55 . Her crew survived.
 * SS Dunkerquois (1911) (🇫🇷 France): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 12 nmi west by north of the Île de Batz, Finistère (48.83333°N, -4.31667°W) by SMU UC-48 with the loss of sixteen of her 31 crew. Survivors were rescued by Phenix (🇫🇷 France)
 * SS Kongsli (1916) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 172 nmi off Punta de Estaca de Bares, Galicia, Spain (46.16667°N, -10.2°W) by SMU UB-48 . Her crew survived.
 * SS Politania (1910) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 10 nmi north west by west of Cape Sigli, Algeria (36.93333°N, 4.63333°W) by SMU UC-67 . Her crew survived.

19 August

 *  Aghios Georgios (🇬🇷 Greece): World War I: The schooner was sunk in the Ionian Sea (36.38333°N, 21.73333°W) by SMU UC-74.
 * SS Brema (1904) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 7.5 nmi south of Flamborough Head, Yorkshire by SMU UC-17 . Her crew were rescued by SS Lonfanny ( undefined).
 * SS Eika II (1906) (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the North Sea 11 nmi west of Sulen, Sogn og Fjordane by SMU U-87 with the loss of a crew member.
 * SS Gartness (1890) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 180 nmi east south east of Malta (34.86667°N, 18.23333°W) by SMU U-40 (Austria-Hungary) with the loss of thirteen of her crew.
 * SS General Dutemple (🇫🇷 France): World War I: The dredger struck a mine and sank in the English Channel off Cherbourg, Seine-Maritime (49.71667°N, -1.56667°W) with the loss of seven of her crew.
 * SS Glocliffe (1915) ( undefined): World War I: The collier was torpedoed and sunk in the English Channel 9 nmi east north east of Berry Head, Devon (50.48333°N, -3.28333°W) by SMU UB-40 with the loss of two of her crew.
 * SS Monksgarth (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 17 nmi north by east of Ouessant, Finistère, France by SMU UC-48 . Her crew survived.
 * SS Rosario (1900) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean south west of Ireland by SMU UC-55 with the loss of twenty of her crew. Two survivors were taken as prisoners of war.
 * SS Spectator (1914) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 11 nmi south East of Galley Head, County Cork (51.46667°N, -8.68333°W) by SMU UC-33 . Her crew survived.
 * SS Thérèse et Marie (1893) (🇫🇷 France): World War I: The cargo ship was sunk in the Bay of Biscay 13 nmi north west of the Île du Pilier, Vendée (47.06667°N, -2.66667°W) by SMU UC-21 with the loss of two of her crew.
 * SS Ytterøy (1914) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 10 nmi east north east of the Île de Batz, Finistère (48.73333°N, -4.48333°W) by SMU UC-48 with the loss of a crew member.

20 August

 * SS Bulysses (1900) World War I: The tanker was torpedoed and sunk in the Atlantic Ocean 142 nmi west north west of the Butt of Lewis by SMU U-52 . Her crew survived.
 * SS Claverley (1907) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 4 nmi south east of the Eddystone Lighthouse by SMU UB-38 with the loss of ten of her crew.
 * HMS E47 : World War I: The E-class submarine was lost in the North Sea on active service with the loss of all 30 crew.
 * SS Edernian (1906) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 6 nmi east of Southwold, Suffolk by SMU UB-10 with the loss of fourteen of her crew.
 * SS Elswick Lodge (1900) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 260 nmi west by south of Ouessant, Finistère, France by SMU U-93 with the loss of four of her crew.
 * RUSSIAN MINESWEEPER Ilya Muromets : World War I: The auxiliary minesweeper struck a mine and sank in Worms Sound with the loss of eleven of her crew. by SMU UC-58 . Her crew survived.
 * SS Incemore (1898) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 52 nmi south east by south of Pantelleria, Italy (36.45°N, 13.03333°W) by SMU U-38 with the loss of a crew member.
 * HMT Kirkland : World War I: The naval trawler struck a mine and sank in the Atlantic Ocean off Papa Stour, Shetland Islands (60.35°N, -1.78333°W) with the loss of eleven crew.
 * Serra do Marco (🇵🇹 Portugal): World War I: The fishing vessel was sunk in the Atlantic Ocean off the coast of Portugal by SMU UB-48.
 * Serra do Pilar (🇵🇹 Portugal): World War I: The fishing vessel was sunk in the Atantic Ocean off the coast of Portugal by SMU UB-48.
 * HMS Vala : World War I: The Q-ship was sunk in the Atlantic Ocean 120 nmi south west of the Isles of Scilly (48.61667°N, -9.46667°W) by SMU UB-54 with the loss of 43 of her crew.

21 August

 * SS Devonian (1900) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 20 nmi north east of Tory Island, County Donegal by SMU U-53 with the loss of two lives.
 * SS Goodwood (1900) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 28 nmi north west by west of Cape Bon, Tunisia by SMU UC-67 . Her crew survived.
 * ST HS 4 ( undefined): World War I: The tug was scuttled in the Atlantic Ocean 130 nmi west south west of Ouessant, Finistère, France by SMU UC-72 . Her crew survived.
 * SS Mountpark (1912) ( undefined): The collier collided with SS Alexandra ( undefined and sank in the Bristol Channel 6 nmi north west of the Bull Point Lighthouse, Devon.
 * USS Nemes (SP-424) : The patrol vessel exploded, caught fire and sank in Cotteral Bay, Florida.
 * SS Norhilda (1910) ( undefined): World War I: The caollier was torpedoed and sunk in the North Sea 5 nmi south east of Scarborough, Yorkshire (54.25°N, -0.16667°W) by SMU UC-17 with the loss of a crew member.
 * SS Oslo (1906) ( undefined): World War I: The cargo liner was torpedoed and sunk in the North Sea 15 nmi east by north of the Out Skerries, Shetland Islands by SMU U-87 with the loss of three of her crew.
 * RB 6 ( undefined): World War I: The refrigerated barge was scuttled in the Atlantic Ocean 130 nmi west south west of Ouessant by SMU UC-72 . Her crew survived.
 * SS Roscommon (1902) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 20 nmi north east of Tory Island by SMU U-53 . Her crew survived.
 * RUSSIAN DESTROYER Stroini : World War I: The Storozhevoi-class destroyer ran aground in the Gulf of Riga whilst minelaying. She was then bombed and sunk by Kaiserliche Marine Friedrichshafen FF.41 aircraft.
 * SMU UC-41 : The Type UC II submarine sank in the Tay estuary after an internal explosion. All 27 crew and 7 British prisoners of war were killed.
 * SS Volodia (1913) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 285 nmi) west of Ouessant, Finistère, France by SMU U-93 with the loss of ten of her crew.

22 August

 * SS Alexander Shukoff (1881) (🇩🇰 Denmark): World War I: The cargo ship was sunk in the Norwegian Sea 30 nmi west of Florø, Sogn og Fjordane, Norway by SMU U-87 . Her crew survived.
 * FRENCH ARMED BOARDING STEAMER Golo II : World War I: The armed boarding steamer was sunk in the Ionian Sea off Corfu, Greece by SMU UC-22 with the loss of 42 lives.
 * SS Gro (1895) (🇳🇴 Norway): World War I: The cargo ship was sunk in the English Channel 6 nmi south of Start Point, Devon, United Kingdom by SMU UC-47 . Her crew survived.
 * HMT Sophron : World War I: The naval trawler struck a mine and sank in the Firth of Tay with the loss of eight of her crew.
 * SS Verdi (1907) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 115 nmi north west by north of Eagle Island, County Mayo (55.25°N, -13.33333°W) by SMU U-53 with the loss of six crew.

23 August

 * SS Boniface (1904) ( undefined): World War I: The cargo liner was torpedeoed and sunk in the Atlantic Ocean 7 nmi north east by north of Arranmore, County Donegal (55.13333°N, -8.45°W) by SMU U-53 with the loss of a crew member.
 *  Carl F. Cressy (🇺🇸 United States): World War I: The four-masted schooner was shelled and sunk in the Atlantic Ocean 180 nmi north west of Cape Finisterre, Spain by SMU U-93 . Her crew survived.
 * SS Constance (1912) (🇫🇷 France): World War I: The cargo ship was sunk in the Mediterranean Sea 142 nmi north east of Malta (36.25°N, 17.41667°W) by SMU U-14 (Austria-Hungary).
 * Fratelli Danielli (🇫🇷 France): World War I: The sailing vessel was sunk in the Mediterranean Sea south of Sicily, Italy by SMU UC-67.
 * SS Peer Gynt (1915) (🇳🇴 Norway): World War I: The cargo ship was sunk in the Atlantic Ocean 4 nmi north of Pendeen Point, Cornwall, United Kingdom (50.38333°N, -5.33333°W) by SMU UC-47 with the loss of four of her crew.
 * SS Veghtstroom (1902) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 7 nmi north west of the Godrevy Lighthouse, Cornwall (50.26667°N, -5.58333°W) by SMU UC-47 with the loss of five of her crew.
 * SS Winlaton (1912) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 25 nmi west of Cape Spartel, Morocco (35.66667°N, -6.41667°W) by SMU UB-48 with the loss of two of her crew. Her captain was taken as a prisoner of war.

24 August

 * SS Henriette (1913) (🇫🇷 France): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 230 nmi north west of Penmarc'h, Finistère (48°N, -14.75°W) by SMU U-62.
 * SS Kilwinning (1898) ( undefined): World War I: The collier was sunk in the Mediterranean Sea 94 nmi east south east of Malta (35.43333°N, 16.5°W) by SMU U-14 (Austria-Hungary) . Her crew survived.
 * SS Parana (1908) (🇫🇷 France): World War I: The troopship was torpedoed and damaged in the Aegean Sea between Andros and Euboea, Greece by SMU UC-74 . She consequently sank in Karystos Bay with the loss of seven lives.
 * Penelope ( undefined): World War I: The cargo ship was torpedoed and sunk in the Baltic Sea off the Swalfre Ort Lighthouse by a Kaiserliche Marine submarine.
 * SS Springhill (1904) ( undefined): World War I: The cargo ship was torpedoed and sunk in the North Sea 4 nmi east north east of Scarborough, Yorkshire (54.35°N, -0.36667°W) by SMU UB-21 with the loss of five of her crew.
 * SS W. H. Dwyer (1913) (🇨🇦 Canada): World War I: The cargo ship was torpedoed and sunk in the English Channel 15 nmi east by north of Berry Head, Devon, United Kingdom (50.3°N, -3.18333°W) by SMU UB-38 . Her crew survived.

25 August

 * SS Cymrian (1905) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 13 nmi south east by south of the Tuskar Rock, Ireland by SMU UC-75 with the loss of ten of her crew.
 * SS Frigga (1900) (🇳🇴 Norway): World War I: The cargo ship was torpedoed and sunk in the English Channel 20 nmi east south east of Portland Bill, Dorset, United Kingdom by SMU UB-54 . Her crew survived.
 * SS Garm (1916) (🇳🇴 Norway): World War I: The coaster was sunk in the English Channel 8 nmi east north east of Start Point, Devon, United Kingdom (50.31667°N, -3.48333°W) by SMU UC-65 . Her crew survived.
 * SS Heatherside (1909) ( undefined): World War I: The collier was sunk in the Atlantic Ocean north west of Cape Ortegal, Spain (46.23333°N, -10.95°W) by SMU U-93 with the loss of 27 of her crew.
 * SS Junona (1898) ( undefined): World War I: The cargo ship was sunk in The Minch (58.53333°N, -5.56667°W) by SMU U-80.
 * SS Malda (1913) ( undefined): World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 130 nmi west of the Bishop Rock, Isles of Scilly by SMU U-70 with the loss of 64 lives.
 * SS Nascent (1915) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 27 nmi south of the Bishop Rock (49.53333°N, -6.41667°W) by SMU UC-49 with the loss of six of her crew.
 * SS Nerma (1893) (🇩🇰 Denmark): World War I: The cargo ship was torpedoed and sunk in the English Channel 3.5 nmi west of Berry Head, Devon by SMU UC-65 with the loss of seven of her crew.
 * SS Ovar (1903) (🇵🇹 Portugal): World War I: The cargo ship was sunk in the Atlantic Ocean (46.08333°N, -11.25°W) by SMU U-93 . Her crew survived.
 * SS Sycamore (1917) ( undefined): World War I: The cargo ship was sunk in the Atlantic Ocean 125 nmi north west of Tory Island, County Donegal by SMU UB-61 with the loss of eleven of her crew.

26 August

 * SS Assyria (1900) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 34 nmi north west by north of Tory Island, County Donegal (55.66667°N, -9°W) by SMU UB-61 . Her crew survived.
 * SS Cassiar (1890) (🇨🇦 Canada): The passenger ship ran aground on Trivet Isle, British Columbia and sank. All on board were rescued.
 * Chacma (🇳🇴 Norway): World War I: The sailing vessel was sunk in the English Channel 50 nmi west of the Casquets, Channel Islands by SMU UC-62 . Her crew survived.
 * SS Durango (1895) ( undefined): World War I: The cargo ship was shelled and sunk in the Atlantic Ocean 50 nmi north west of Barra Head, Outer Hebrides (57.13333°N, -8.91667°W) by SMU U-53 . Her crew survived.
 * SS Eirini (1897) (🇬🇷 Greece): World War I: The cargo ship struck a mine and sank in the Atlantic Ocean 2.75 nmi west of Hartland Point, Devon, United Kingdom.
 * SS Feltre (1904) ( undefined): World War I: The cargo ship was sunk in the North Sea 4 nmi south south east of Flamborough Head, Yorkshire, United Kingdom by SMU UB-32.
 * SS Kenmore (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 30 nmi north of Inishtrahull Island, County Donegal (55.95°N, -7.5°W) by SMU U-53 with the loss of five crew.
 * Maria del Carmine ( undefined): World War I: The sailing vessel was sunk in the Mediterranean Sea east of Sicily by SMU UC-35.
 * SS Marmion (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 300 nmi west by south of Ouessant, Finistère, France (46.3°N, -11.66667°W) by SMU U-93 with the loss of seventeen of her crew.
 * SS Maurizio P. (1881) ( undefined): World War I: the coaster was sunk in the Mediterranean Sea (36.93333°N, 0.25°W) by SMU UC-20 . Her crew survived.
 *  Minas Queen (🇨🇦 Canada): World War I: The three-masted schooner was shelled and sunk in the Atlantic Ocean 350 nmi north west of Cape Finisterre, Spain (46.38333°N, -10.4°W) by SMU U-93 with the loss of six of her crew.
 * SS Titian (1902) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 170 nmi south east of Malta (34.33333°N, 17.5°W) by SMU U-14 (Austria-Hungary) . Her crew survived.

27 August

 * SS Anna (1914) (🇩🇰 Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea 25 nmi east of Lerwick, Shetland Islands, United Kingdom by SMU U-87 with the loss of a crew member.
 * SS Aurora (1905) (🇩🇰 Denmark): World War I: The cargo ship was torpedoed and sunk in the North Sea 25 nmi east south east of Lerwick (60.58333°N, 0.11667°W) by SMU U-87 with the loss of a crew member.
 * SS Hathor (1914) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 50 nmi off Cape Ténès, Algeria by SMU UB-48 with the loss of a crew member. Her captain was taken as a prisoner of war.

28 August

 * SS Hidalgo (1908) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Barents Sea 120 nmi north east of the North Cape, Norway by SMU U-28 (Germany) with the loss of fifteen crew.
 * SS Marselieza (1900) ( undefined): World War I: The cargo ship was sunk in the Barents Sea 110 nmi north west by north of the North Cape (72.5°N, 29°W) by SMU U-28 (Germany).
 * SS Nairn (1904) ( undefined): World War I: The collier was torpedoed and sunk in the Mediterranean Sea 125 nmi north by west of Benghazi, Libya (34.08333°N, 19.33333°W) by SMU U-14 (Austria-Hungary) . Her crew survived.
 * Pasqualino Carmela ( undefined): World War I: The sailing vessel was sunk in the Strait of Messina by SMU UC-38.
 * SS Scilla (1896) ( undefined): World War I: The ferry struck a mine and sank in the Strait of Messina.
 * SS Whitecourt (1905) ( undefined): World War I: The cargo ship was shelled and sunk in the Barents Sea 120 nmi north north east of the North Cape (72.8°N, 29°W) by SMU U-28 (Germany) . Her crew survived.

29 August

 *  Cooroy ( undefined): World War I: The four-masted barque was torpedoed and sunk in the Irish Sea 16 nmi south south east of Ballycotton, County Cork by SMU UC-75 . Her crew survived.
 *  Laura C. Anderson (🇺🇸 United States): World War I: The four-masted schooner was sunk in the English Channel 15 nmi east of Barfleur, Manche, France (49.71667°N, -0.91667°W) by SMU UC-65 . Her crew survived.
 * SS Lynburn (1917) ( undefined): World War I: The coaster struck a mine and sank in the Irish Sea 0.5 nmi south east of the Arklow Lightship ( undefined) with the loss of eight of her crew.
 * SS Milazzo (1916) ( undefined): World War I: The bulk carrier was sunk in the Mediterranean Sea 250 nmi east of Malta (34.73333°N, 19.26667°W) by SMU U-14 (Austria-Hungary).
 * SS Treloske (1902) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 145 nmi north north west of Cape Finisterre, Spain by SMU U-93 with the loss of a crew member.
 * SS Vronwen (1917) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 20 nmi north west by north of Gozo, Malta (36.2°N, 13.93333°W) by SMU UC-38 with the loss of a crew member.

30 August

 * SS Athinai (1872) (🇬🇷 Greece): World War I: The coaster was shelled and sunk in the Kassos Strait south east of Cape Sidero, Crete by SMU UC-74.
 * SS Eastern Prince (1910) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 30 nmi south west of the Eddystone Lighthouse (49.68333°N, -4.2°W) by SMU U-62 with the loss of five crew.
 * SS Grelhame (1909) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel 4 nmi south west of Start Point by SMU U-62 . Her crew survived.
 * SS Natal (🇫🇷 France): The passenger ship collided with another French merchant vessel and sank in the Mediterranean Sea off Marseille, Bouches-du-Rhône. All 520 people on board were rescued.
 * SS Noya (1912) ( undefined): World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 8 nmi west south west of The Lizard, Cornwall (49.86667°N, -5.36667°W) by SMU U-62 with the loss of a crew member.
 * HMT Ocean's Gift II : The naval trawler was lost on this date.

31 August

 * SS Eleni (1877) (🇬🇷 Greece): World War I: The coaster was sunk in the Kassos Strait by SMU UC-74 . Her crew survived.
 * SS Erissos (1902) (🇬🇷 Greece): World War I: The cargo ship was torpedoed and damaged in the English Channel 7 to 8 nmi south east of Berry Head, Devon, United Kingdom by SMU UC-65 . She was beached but was later refloated.
 * SS Marques de Mudela (1883) (🇪🇸 Spain): World War I: The cargo ship struck a mine and sank in the Bay of Biscay 14 nmi off the La Coubre Lighthouse, Finistère, France (45.4°N, -1.28333°W). Her crew survived.
 * SS Miniota (1914) ( undefined): World War I: The cargo ship was torpedoed and sunk in the English Channel (49.83333°N, -3°W) by SMU U-19 (Germany) with the loss of three of her crew.
 * SS Vernon (1878) ( undefined): World War I: The coaster was torpedoed and sunk in the North Sea 22 nmi south east by south of Spurn Head, Yorkshire by SMU UB-30 with the loss of a crew member.
 * SS Westbury (1904) ( undefined): World War I: The collier was torpedoed and sunk in the Atlantic Ocean 8 nmi south south east of the Fastnet Rock (51.3°N, -9.36667°W) by SMU U-48 . Her crew survived.

Unknown date

 * SMU UC-72 : World War I: The Type UC II submarine was lost on active service after 21 August with the loss of all 31 crew.