# List of shipwrecks in September 1918

The list of shipwrecks in September 1918 includes ships sunk, foundered, grounded, or otherwise lost during September 1918.

## 1 September

List of shipwrecks: 1 September 1918 :
| Ship | State | Description |
| Ami de Dieu | France | World War I: The trawler was sunk in the Atlantic Ocean (approximately 47°32′N 8°55′W﻿ / ﻿47.533°N 8.917°W﻿ / 47.533; -8.917) by SM U-53 ( Imperial German Navy). |
| City of Glasgow | United Kingdom | World War I: The passenger ship was torpedoed and sunk in the Atlantic Ocean 21 nautical miles (39 km) east of the Tuskar Rock, Ireland (52°17′N 5°38′W﻿ / ﻿52.283°N 5.633°W﻿ / 52.283; -5.633) by SM UB-118 ( Imperial German Navy) with the loss of twelve lives. |
| Etoile Polaire | France | World War I: The trawler was shelled and sunk in the Atlantic Ocean 176 nautical miles (326 km) off Penmarc'h, Finistère (47°32′N 8°55′W﻿ / ﻿47.533°N 8.917°W﻿ / 47.533; -8.917) by SM U-53 ( Imperial German Navy) with the loss of a crew member. |
| Libertador | Portugal | World War I: The trawler was scuttled west of Gibraltar by SM U-22 ( Imperial German Navy). |
| Mesaba | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 21 nautical miles (39 km) east of the Tuskar Rock (52°17′N 5°38′W﻿ / ﻿52.283°N 5.633°W﻿ / 52.283; -5.633) by SM UB-118 ( Imperial German Navy) with the loss of twenty of her crew. |
| St. Louis | United States | The steamer sank, partially submerged, in 25 feet (7.6 m) of water 22 miles (35 km) south of St. Louis, Missouri. One passenger killed. |

## 2 September

List of shipwrecks: 2 September 1918 :
| Ship | State | Description |
| SMS Estebrugge | Imperial German Navy | The Vorpostenboot was lost on this date. |
| Hirondelle | France | World War I: The fishing vessel was sunk in the Atlantic Ocean (47°32′N 8°55′W﻿ / ﻿47.533°N 8.917°W﻿ / 47.533; -8.917) by SM U-53 ( Imperial German Navy). |
| Nicolazic | France | World War I: The fishing vessel was sunk in the Atlantic Ocean (47°32′N 8°55′W﻿ / ﻿47.533°N 8.917°W﻿ / 47.533; -8.917) by SM U-53 ( Imperial German Navy). Her crew survived. |
| San Andres | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 40 nautical miles (74 km) north by west of Port Said, Egypt by SM U-65 ( Imperial German Navy). Her crew survived. |
| Stortind | Norway | World War I: The cargo ship was scuttled in the Atlantic Ocean 360 nautical miles (670 km) north of the Azores, Portugal by SM U-155 ( Imperial German Navy). Her crew survived. |

## 3 September

List of shipwrecks: 3 September 1918 :
| Ship | State | Description |
| Brava | Portugal | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 3.5 nautical miles (6.5 km) north west of Trevose Head, Cornwall, United Kingdom (50°34′N 5°06′W﻿ / ﻿50.567°N 5.100°W﻿ / 50.567; -5.100) by SM UB-125 ( Imperial German Navy) with the loss of seventeen of her crew. |
| Bogstad | Norway | The cargo ship departed from Brest, Finistère, France for Cardiff, Glamorgan, United Kingdom. No further trace, presumed foundered with the loss of all hands. |
| Highcliffe | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 13 nautical miles (24 km) south east of the Tuskar Rock, Ireland (51°56′N 5°54′W﻿ / ﻿51.933°N 5.900°W﻿ / 51.933; -5.900) by SM UB-87 ( Imperial German Navy) with the loss of a crew member. |
| Lake Owens | United States | World War I: The cargo ship was sunk in the Atlantic Ocean 3.5 nautical miles (6.5 km) north west by west of Trevose Head (50°32′N 5°08′W﻿ / ﻿50.533°N 5.133°W﻿ / 50.533; -5.133) by SM UB-125 ( Imperial German Navy) with the loss of five of her crew. |

## 4 September

List of shipwrecks: 4 September 1918 :
| Ship | State | Description |
| Arum | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 40 nautical miles (74 km) east of Pantelleria, Italy (36°50′N 12°50′E﻿ / ﻿36.833°N 12.833°E﻿ / 36.833; 12.833) by SM UC-54 ( Imperial German Navy). Her crew survived. |
| Bogstad | Norway | World War I: The cargo ship was sunk in the Bristol Channel 18 nautical miles (33 km) south of Lundy Island, Devon, United Kingdom by SM UB-125 ( Imperial German Navy) with the loss of all twelve of her crew. |
| Dora | United States | World War I: The cargo ship was sunk in the Atlantic Ocean off the coast of France (49°26′N 12°36′W﻿ / ﻿49.433°N 12.600°W﻿ / 49.433; -12.600) by SM U-82 ( Imperial German Navy). Her crew survived. |
| Richard | Norway | World War I: The sailing vessel was sunk in the Mediterranean Sea off Majorca, Spain (39°49′N 1°51′E﻿ / ﻿39.817°N 1.850°E﻿ / 39.817; 1.850) by SM U-34 ( Imperial German Navy). Her crew survived. |
| Santa Maria | Portugal | World War I: The trawler was scuttled in the Atlantic Ocean off Peniche by SM U-22 ( Imperial German Navy). |
| Villa Franca | Portugal | World War I: The tug was shelled and sunk in the Atlantic Ocean off Lisbon by SM U-22 ( Imperial German Navy). |
| War Firth | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 33 nautical miles (61 km) south by west of The Lizard, Cornwall by SM U-53 ( Imperial German Navy) with the loss of eleven crew. |

## 5 September

List of shipwrecks: 5 September 1918 :
| Ship | State | Description |
| Dolphin | Soviet Navy Red Movement | Russian Civil War: The gunboat was shelled and sunk at Kazan on the Volga River by White Movement or Czechoslovak Legion artillery. |
| Rio Mondego | Portugal | World War I: The schooner was damaged by scuttling charges in the Atlantic Ocean 40 nautical miles (74 km) off Land's End, Cornwall, United Kingdom. The charges were placed by SM U-53 ( Imperial German Navy). She was towed to the Isles of Scilly and beached. Despite being placed under guard, some of her cargo of port was liberated by the locals. |
| SM UC-91 | Imperial German Navy | The Type UC III submarine collided with Alexandra Woermann ( Germany) in the Baltic Sea (54°21′N 10°10′E﻿ / ﻿54.350°N 10.167°E﻿ / 54.350; 10.167﻿ (SM UC-91)) and sank with the loss of 17 crew. She was raised on 6 September, repaired and returned to service. |

## 6 September

List of shipwrecks: 6 September 1918 :
| Ship | State | Description |
| Almirante | United Kingdom | The United Fruit Company passenger-cargo ship sank in the Atlantic Ocean after colliding with the tanker USS Hisko ( United States Navy) 16 nautical miles (30 km) off the coast of New Jersey near Atlantic City at approximately (39°21′N 74°13′W﻿ / ﻿39.350°N 74.217°W﻿ / 39.350; -74.217﻿ (Amirante)). All but five to seven of the 105 passengers and crew survived. |
| Audax | United Kingdom | World War I: The coaster was torpedoed and sunk in the North Sea 6.5 nautical miles (12.0 km) east by north of Robin Hood's Bay, Yorkshire (54°29′N 0°21′W﻿ / ﻿54.483°N 0.350°W﻿ / 54.483; -0.350) by SM UB-80 ( Imperial German Navy) with the loss of three of her crew. |
| Milly | United Kingdom | World War I: The collier was torpedoed and sunk in the Atlantic Ocean 2.25 nautical miles (4.17 km) west by south of Tintagel Head, Cornwall (50°30′N 4°52′W﻿ / ﻿50.500°N 4.867°W﻿ / 50.500; -4.867) by SM UB-87 ( Imperial German Navy) with the loss of two of her crew. |

## 7 September

List of shipwrecks: 7 September 1918 :
| Ship | State | Description |
| Bellbank | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 25 nautical miles (46 km) south south west of the Île du Planier, Bouches-du-Rhône, France (42°48′N 5°08′E﻿ / ﻿42.800°N 5.133°E﻿ / 42.800; 5.133) by SM UC-67 ( Imperial German Navy) with the loss of a crew member. |
| SMS M41 | Imperial German Navy | World War I: The Type 1915 minesweeper struck a mine and sank. |
| Ruysdael | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 228 nautical miles (422 km) west by south of Ouessant, Finistère, France (46°53′N 10°07′W﻿ / ﻿46.883°N 10.117°W﻿ / 46.883; -10.117) by SM U-105 ( Imperial German Navy) with the loss of twelve crew. |
| Santa Maria | Portugal | The barque was destroyed by fire in the Atlantic Ocean (13°25′S 15°00′W﻿ / ﻿13.417°S 15.000°W﻿ / -13.417; -15.000). Her crew survived. |
| Sophia | Portugal | World War I: The schooner was sunk in the Atlantic Ocean off the coast of Newfoundland by SM U-155 ( Imperial German Navy). |
| Vicenza | Italy | World War I: The cargo ship was sunk in the Mediterranean Sea south of Salonica, Greece (39°42′N 23°18′E﻿ / ﻿39.700°N 23.300°E﻿ / 39.700; 23.300) by SM UB-42 ( Imperial German Navy). |

## 8 September

List of shipwrecks: 8 September 1918 :
| Ship | State | Description |
| HMS Nessus | Royal Navy | The Admiralty M-class destroyer collided with HMS Amphitrite ( Royal Navy) in the North Sea and sank. |

## 9 September

List of shipwrecks: 9 September 1918 :
| Ship | State | Description |
| Dorisbrook | United Kingdom | The collier collided with HMS Orbita ( Royal Navy) and sank in the Pacific Ocean off the coast of Peru. Her crew were rescued by HMS Orbita. |
| Baywest | United Kingdom | World War I: The cargo ship was accidentally shelled by a French steamer, she caught fire and sank 1.5 miles (2.4 km) south west of Longships, Cornwall. |
| Helvetia | Norway | World War I: The sailing vessel was sunk in the North Sea 22 nautical miles (41 km) west south west of Lindesnes, Vest-Agder by SM U-80 ( Imperial German Navy). Her crew survived. |
| Missanabie | United Kingdom | World War I: The ocean liner was torpedoed and sunk in the Irish Sea 51°11′N 7°25′W﻿ / ﻿51.183°N 7.417°W﻿ / 51.183; -7.417) by SM UB-87 ( Imperial German Navy) with the loss of 45 lives. |
| Taurus | Norway | World War I: The cargo ship was sunk in the North Sea 1 nautical mile (1.9 km) north of Scarborough, Yorkshire, United Kingdom by SM UB-80 ( Imperial German Navy) with the loss of six of her crew. |
| SM U-92 | Imperial German Navy | World War I: The Type U 87 submarine struck a mine in the North Sea (59°00′N 1°30′W﻿ / ﻿59.000°N 1.500°W﻿ / 59.000; -1.500) and sank with the loss of all 39 crew. |
| War Arabis | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 88 nautical miles (163 km) north by east of Cape Sigli, Algeria (38°08′N 5°30′E﻿ / ﻿38.133°N 5.500°E﻿ / 38.133; 5.500) by SM U-34 ( Imperial German Navy). Her crew survived. |

## 10 September

List of shipwrecks: 10 September 1918 :
| Ship | State | Description |
| SM UB-83 | Imperial German Navy | World War I: The Type UB III submarine was depth charged and sunk in the North Sea off the Orkney Islands, United Kingdom (58°28′N 1°50′W﻿ / ﻿58.467°N 1.833°W﻿ / 58.467; -1.833) by HMS Ophelia ( Royal Navy) with the loss of all 37 crew. |

## 11 September

List of shipwrecks: 11 September 1918 :
| Ship | State | Description |
| Governor Powers | United States | The schooner was sunk in a collision in western Nantucket Sound. |

## 12 September

For the scuttling of the Danish schooner Skjold on this date, see the entry for 3 August 1918.
List of shipwrecks: 12 September 1918 :
| Ship | State | Description |
| Galway Castle | United Kingdom | World War I: The ocean liner was torpedoed and damaged in the Atlantic Ocean 160 nautical miles (300 km) south west of the Fastnet Rock (48°50′N 10°40′W﻿ / ﻿48.833°N 10.667°W﻿ / 48.833; -10.667) by SM U-82 ( Imperial German Navy). She was taken in tow but sank on 15 September with the loss of 143 lives. |
| Leixões | Portugal | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) off the coast of the United States by SM U-155 ( Imperial German Navy). |
| HMS Sarnia | Royal Navy | World War I: The armed boarding steamer was sunk in the Mediterranean Sea off Alexandria, Egypt (31°58′N 30°55′E﻿ / ﻿31.967°N 30.917°E﻿ / 31.967; 30.917) by SM U-65 ( Imperial German Navy) with the loss of 55 crew. |

## 13 September

List of shipwrecks: 13 September 1918 :
| Ship | State | Description |
| Amiral Charner | France | World War I: The cargo ship was sunk in the Mediterranean Sea 44 nautical miles (81 km) west of Pantellaria, Italy (36°36′N 12°58′E﻿ / ﻿36.600°N 12.967°E﻿ / 36.600; 12.967) by SM U-41 ( Austro-Hungarian Navy). |
| Buffalo | United Kingdom | World War I: The coaster was torpedoed and sunk in the Irish Sea of Corsewall Point, Wigtownshire by SM UB-64 ( Imperial German Navy) with the loss of ten of her crew. |
| M. J. Craig | United Kingdom | World War I: The coaster was torpedoed and sunk in the Irish Sea 7 nautical miles (13 km) north east of Black Head, County Antrim by SM UB-64 ( Imperial German Navy) with the loss of four of her crew. |
| Setter | United Kingdom | World War I: The passenger ship was torpedoed and sunk in the Irish Sea 9 nautical miles (17 km) north west of Stranraer, Wigtownshire by SM UB-64 ( Imperial German Navy) with the loss of nine of her crew. |

## 14 September

List of shipwrecks: 14 September 1918 :
| Ship | State | Description |
| Agios Nicolas | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea 10 nautical miles (19 km) south east of Paphos by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Columbia | United States | The 19-gross register ton, 41-foot (12.5 m) fishing vessel sank in Saint Matthews Bay (60°44′N 146°20′W﻿ / ﻿60.733°N 146.333°W﻿ / 60.733; -146.333﻿ (Saint Matthews Bay)) on the south-central coast of the Territory of Alaska. All five people on board survived. |
| Gibel Hamam | United Kingdom | World War I: The coaster was torpedoed and sunk in the English Channel 15 nautical miles (28 km) south of Portland Bill by SM UB-104 ( Imperial German Navy) with the loss of 21 of her crew. |
| Ioanna No.45 | United Kingdom | World War I: The sailing vessel was sunk in the Mediterranean Sea by SM U-65 ( Imperial German Navy). |
| Moguchiy | Soviet Navy | Russian Civil War: Allied Intervention in the Russian Civil War; The gunboat was shelled and sunkin the Dvina River by British Monitors. 18 crewmen killed, 5 rescued, 7 POW. |
| Neotsfield | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Irish Sea 1.5 nautical miles (2.8 km) off the Skulmartin Lightship ( United Kingdom) (54°42′N 5°23′W﻿ / ﻿54.700°N 5.383°W﻿ / 54.700; -5.383) by SM UB-64 ( Imperial German Navy). Her crew survived. |
| SM UB-113 | Imperial German Navy | World War I: The Type UB III submarine departed Zeebrugge, West Flanders, Belgium on patrol. No further trace, lost with all 39 crew. |
| Unknown boat | Soviet Navy Red Movement | Russian Civil War: The minelaying boat was run aground and abandoned on the Volga River. |

## 15 September

List of shipwrecks: 15 September 1918 :
| Ship | State | Description |
| Ioanna No.37 | United Kingdom | World War I: The sailing vessel was sunk in the Mediterranean Sea by SM U-65 ( Imperial German Navy). |
| Energy | United Kingdom | World War I: The sailing vessel was shelled and sunk in the Irish Sea 14 nautical miles (26 km) east south east of the Codling Bank Lightship ( United Kingdom) by SM UB-64 ( Imperial German Navy). |
| Joseph Fisher | United Kingdom | World War I: The two-masted schooner was shelled and sunk in the Irish Sea 16 nautical miles (30 km) east north east of the Codling Bank Lightship ( United Kingdom) by SM UB-64 ( Imperial German Navy). |
| Kendal Castle | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the English Channel 4 nautical miles (7.4 km) south east of Berry Head, Devon by SM UB-104 ( Imperial German Navy) with the loss of eighteen of her crew. |
| Mary Fanny | United Kingdom | World War I: The ketch was shelled and sunk in the Irish Sea 14 nautical miles (26 km) east south east of the Codling Bank Lightship ( United Kingdom) by SM UB-64 ( Imperial German Navy). |

## 16 September

List of shipwrecks: 16 September 1918 :
| Ship | State | Description |
| Acadian | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 11 nautical miles (20 km) south west by west of Trevose Head, Cornwall (50°25′10″N 5°15′58″W﻿ / ﻿50.41944°N 5.26611°W﻿ / 50.41944; -5.26611) by SM UB-117 ( Imperial German Navy) with the loss of 25 of her 26 crew. |
| USS Buena Ventura | United States Navy | World War I: Convoy OV 31: The cargo ship was torpedoed and sunk in the Atlantic Ocean 200 nautical miles (370 km) north west of Spain (44°36′N 13°10′W﻿ / ﻿44.600°N 13.167°W﻿ / 44.600; -13.167) by SM UB-129 ( Imperial German Navy) with the loss of eighteen of her crew. Survivors were rescued by Lola ( Spain) and Temeraire ( French Navy). |
| Dedushka | Soviet Union | Russian Civil War: Allied Intervention in the Russian Civil War; The ship was lost to enemy action. |
| Ethel | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the English Channel 8 nautical miles (15 km) south east of Berry Head, Devon by SM UB-104 ( Imperial German Navy). Her crew survived. |
| HMS Glatton | Royal Navy | The Gorgon-class monitor caught fire at Dover, Kent and was scuttled by HMS Cossack and HMS Myngs (both Royal Navy) with the loss of 79 of her 305 crew. |
| G. Voyazides | Greece | World War I: The cargo ship was torpedoed and sunk in the Gulf of Lion by SM UC-67 ( Imperial German Navy) with the loss of eighteen of her crew. |
| Lord Stewart | United Kingdom | World War I: The collier was torpedoed and sunk in the English Channel 6 nautical miles (11 km) east of Hope's Nose, Devon (50°30′N 3°17′W﻿ / ﻿50.500°N 3.283°W﻿ / 50.500; -3.283) by SM UB-104 ( Imperial German Navy) with the loss of a crew member. |
| Madryn | United Kingdom | World War I: The collier was torpedoed and sunk in the Atlantic Ocean 5 nautical miles (9.3 km) north north east of Trevose Head (50°38′N 5°01′W﻿ / ﻿50.633°N 5.017°W﻿ / 50.633; -5.017) by SM U-82 ( Imperial German Navy). Her crew survived. |
| Philomel | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Bay of Biscay 12 nautical miles (22 km) south east by east of the Glénan Islands, Finistère (47°43′N 3°41′W﻿ / ﻿47.717°N 3.683°W﻿ / 47.717; -3.683) by SM UB-88 ( Imperial German Navy). Her crew survived. |
| Serula | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Irish Sea 13.5 nautical miles (25.0 km) north east of Strumble Head, Pembrokeshire by SM UB-64 ( Imperial German Navy) with the loss of seventeen crew. |
| Star of Poland | United States | The cargo ship was wrecked at Chiba, Japan. |
| Tasman | United Kingdom | World War I: The cargo liner was torpedoed and sunk in the Atlantic Ocean 220 nautical miles (410 km) north by west of Cape Villano, Spain by SM U-46 ( Imperial German Navy) with the loss of fourteen crew. |
| Wellington | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 175 nautical miles (324 km) north west of Cape Villano (45°48′N 10°58′W﻿ / ﻿45.800°N 10.967°W﻿ / 45.800; -10.967) by SM U-118 ( Imperial German Navy) with the loss of five of her crew. |

## 17 September

List of shipwrecks: 17 September 1918 :
| Ship | State | Description |
| Blackford | United States | The cargo ship sprung a leak on her maiden voyage 250 miles (400 km) south of Magdalena Bay and was abandoned. She eventually drifted ashore off Rodo Sinaloa near Mazatlan, Mexico a total loss. |
| Cairo | Egypt | World War I: The sailing vessel was shelled and sunk in the Mediterranean Sea by an enemy submarine. |
| Coos Bay | United States | The steamer sank south west of the tip of Baja California. |
| Igor | Sweden | World War I: The cargo ship sank after an explosion in the North Sea, south of Longstone, while in convoy. Whether it was a torpedo or mine is unknown. Her crew survived. |
| Lavernock | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 5 nautical miles (9.3 km) south west of Trevose Head, Cornwall 50°28′N 5°06′W﻿ / ﻿50.467°N 5.100°W﻿ / 50.467; -5.100 by SM UB-117 ( Imperial German Navy). Her crew survived. |
| Muriel | United Kingdom | World War I: The collier was torpedoed and sunk in the North Sea 3.5 nautical miles (6.5 km) north east of Peterhead, Aberdeenshire (57°32′06″N 1°44′16″W﻿ / ﻿57.53500°N 1.73778°W﻿ / 57.53500; -1.73778) by SM UC-58 ( Imperial German Navy). Her crew survived. |
| No. 1 | Soviet Navy Red Movement | Russian Civil War: The gunboat was grounded in a trap and then shelled by artillery and abandoned on the Kama River. One crewman was killed, another was wounded, and three were captured. |
| Portaritissa | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea (35°39′N 26°08′E﻿ / ﻿35.650°N 26.133°E﻿ / 35.650; 26.133) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Sofia | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea (35°39′N 26°08′E﻿ / ﻿35.650°N 26.133°E﻿ / 35.650; 26.133) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Ursa | Sweden | World War I: The cargo ship was torpedoed and sunk in Lyme Bay by SM UB-104 ( Imperial German Navy). Her crew survived. |
| Wigbert | Imperial German Navy | World War I: The minesweeper struck a mine in the mouth of the Elbe at Cuxhaven, Germany, and became a constructive total loss. |

## 18 September

List of shipwrecks: 18 September 1918 :
| Ship | State | Description |
| Adelphotis | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea (36°14′N 25°25′E﻿ / ﻿36.233°N 25.417°E﻿ / 36.233; 25.417) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Agios Amma | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea (36°14′N 25°25′E﻿ / ﻿36.233°N 25.417°E﻿ / 36.233; 25.417) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Buffalo | France | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 2 nautical miles (3.7 km) east of St Agnes Head, Cornwall, United Kingdom (50°19′N 5°18′W﻿ / ﻿50.317°N 5.300°W﻿ / 50.317; -5.300) by SM UB-117 ( Imperial German Navy). |
| Helena | United States | The cargo ship ran aground on West Chicken Island, Lake Erie. She broke in two on 25 September and was a total loss. |
| John O. Scott | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 9 nautical miles (17 km) west by north of Trevose Head, Cornwall (50°32′N 5°16′W﻿ / ﻿50.533°N 5.267°W﻿ / 50.533; -5.267) by SM UB-117 ( Imperial German Navy) with the loss of eighteen of her crew. |
| Ledaal | Norway | World War I: The cargo ship was scuttled in the Atlantic Ocean (33°50′N 20°05′W﻿ / ﻿33.833°N 20.083°W﻿ / 33.833; -20.083) by SM U-157 ( Imperial German Navy) with the loss of a crew member. |
| Primo | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 3.5 nautical miles (6.5 km) north north west of the Godrevy Lighthouse, Cornwall (50°17′N 5°28′W﻿ / ﻿50.283°N 5.467°W﻿ / 50.283; -5.467) by SM UB-117 ( Imperial German Navy). Her crew survived. |
| USS Scout Patrol No. 907 | United States Navy | The patrol vessel caught fire and burned to water line at the entrance to Narragansett Bay. |

## 19 September

List of shipwrecks: 19 September 1918 :
| Ship | State | Description |
| Agios Spiridon | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea (36°04′N 24°00′E﻿ / ﻿36.067°N 24.000°E﻿ / 36.067; 24.000) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Barrister | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Irish Sea 9 nautical miles (17 km) west of the Chicken Rock Lighthouse, Isle of Man by SM UB-64 ( Imperial German Navy) with the loss of 30 crew. |
| Belliqueux | France | World War I: The vessel struck a mine and sank in the Bay of Biscay 1 nautical mile (1.9 km) off the Tevenec Lighthouse, Île de Sein, Finistère. |
| Erik | Denmark | World War I: The three-masted schooner was shelled and damaged in the Atlantic Ocean 75 nautical miles (139 km) west of Cape Roca, Spain (38°05′N 10°17′W﻿ / ﻿38.083°N 10.283°W﻿ / 38.083; -10.283) by SM UB-129 ( Imperial German Navy). She foundered three days later. |
| Fanny | Sweden | World War I: The cargo ship was sunk in the Raz de Sein by SM UB-88 ( Imperial German Navy), with the loss of two crew members. |
| Gordon C. | Newfoundland | The cargo ship was destroyed by fire 12 nautical miles (22 km) north east of Grate's Cove. |

## 20 September

List of shipwrecks: 20 September 1918 :
| Ship | State | Description |
| Aghios Nicolaos | Greece | World War I: The sailing vessel was scuttled in the Mediterranean Sea (36°57′N 22°05′E﻿ / ﻿36.950°N 22.083°E﻿ / 36.950; 22.083) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Aghios Nicolas | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea (36°26′N 22°20′E﻿ / ﻿36.433°N 22.333°E﻿ / 36.433; 22.333) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Aghios Spiridon | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea (36°26′N 22°20′E﻿ / ﻿36.433°N 22.333°E﻿ / 36.433; 22.333) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Angelina Pasquale | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off Sicily by SM UB-105 ( Imperial German Navy). |
| Circé | French Navy | World War I: The submarine was sunk in the Adriatic Sea (41°39′N 19°25′E﻿ / ﻿41.650°N 19.417°E﻿ / 41.650; 19.417) by SM U-47 ( Austro-Hungarian Navy) with the loss of all but one of her crew. |
| Dragonos | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea (36°59′N 21°59′E﻿ / ﻿36.983°N 21.983°E﻿ / 36.983; 21.983) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Igor | Sweden | The cargo ship sprang a leak and sank. |
| Kingfisher | United States | World War I: The trawler was sunk in the Atlantic Ocean 85 nautical miles (157 km) off Halifax, Nova Scotia, Canada (43°31′N 61°53′W﻿ / ﻿43.517°N 61.883°W﻿ / 43.517; -61.883) by SM U-155 ( Imperial German Navy). Her crew survived. |
| Prof. Elias | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea (36°42′N 22°12′E﻿ / ﻿36.700°N 22.200°E﻿ / 36.700; 22.200) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| San Michele | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off Sicily by SM UB-105 ( Imperial German Navy). |
| Theologos | Greece | World War I: The sailing vessel was sunk in the Mediterranean Sea (36°57′N 22°05′E﻿ / ﻿36.950°N 22.083°E﻿ / 36.950; 22.083) by SM U-27 ( Austro-Hungarian Navy). Her crew survived. |
| Von Jonquieres | Imperial German Navy | The Max Kochen-class Vorpostenboot capsized and sank in a storm off Helgoland. |

## 21 September

List of shipwrecks: 21 September 1918 :
| Ship | State | Description |
| Downshire | United Kingdom | World War I: The coaster was shelled and sunk in the Irish Sea 8 nautical miles (15 km) west of Rockabill by SM UB-64 ( Imperial German Navy). Her crew survived. |
| Santo Fortunato | Italy | World War I: The sailing vessel was sunk in the Mediterranean Sea off Sicily by SM UB-105 ( Imperial German Navy). |
| Staithes | United Kingdom | World War I: The coaster was torpedoed and sunk in the North Sea 1.5 nautical miles (2.8 km) south east by south of Sunderland, County Durham by SM UB-115 ( Imperial German Navy) with the loss of four of her crew. |

## 22 September

List of shipwrecks: 22 September 1918 :
| Ship | State | Description |
| HMT Elise | Royal Navy | World War I: The naval trawler was torpedoed and sunk in the North Sea 2 nautical miles (3.7 km) north east of St. Mary's Lighthouse, Northumberland (55°06′N 1°27′W﻿ / ﻿55.100°N 1.450°W﻿ / 55.100; -1.450) by SM UB-34 ( Imperial German Navy) with the loss of fourteen of her crew. |
| Euthamia | United Kingdom | World War I: The trawler struck a mine and sank in the North Sea 6 nautical miles (11 km) east by north of the Humber Lightship ( United Kingdom). |
| Gaia | Portugal | World War I: The sailing vessel was sunk in the Atlantic Ocean off the Azores (37°13′N 23°19′W﻿ / ﻿37.217°N 23.317°W﻿ / 37.217; -23.317) by SM U-157 ( Imperial German Navy). |
| Gorsemore | United Kingdom | World War I: The collier was torpedoed and sunk in the Mediterranean Sea 44 nautical miles (81 km) south east of Cape Colonne, Italy (38°28′N 17°51′E﻿ / ﻿38.467°N 17.850°E﻿ / 38.467; 17.850) by SM UC-53 ( Imperial German Navy). Her crew survived. |
| Polesley | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean 1 nautical mile (1.9 km) north of the Pendeen Lighthouse, Cornwall (50°13′N 4°46′W﻿ / ﻿50.217°N 4.767°W﻿ / 50.217; -4.767) by SM UB-88 ( Imperial German Navy) with the loss of 43 of her crew. |

## 23 September

List of shipwrecks: 23 September 1918 :
| Ship | State | Description |
| Aldershot | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the English Channel 5 nautical miles (9.3 km) east south east of Dartmouth, Devon by SM UB-104 or SM UB-113 (both Imperial German Navy) with the loss of a crew member. |
| Edlington | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 70 nautical miles (130 km) east by south of Cape Passaro, Sicily, Italy (36°42′N 16°37′E﻿ / ﻿36.700°N 16.617°E﻿ / 36.700; 16.617) by SM UC-54 ( Imperial German Navy). Her crew survived. |

## 24 September

List of shipwrecks: 24 September 1918 :
| Ship | State | Description |
| Erik | Sweden | The schooner sprang a leak and sank in the Atlantic Ocean off Huelva, Andalusia, Spain. Her crew were rescued by two Spanish merchant vessels. |
| Scow No. 21 | United States | The scow sank near the dock of the Groton Iron Works, Groton, Connecticut. |

## 25 September

List of shipwrecks: 25 September 1918 :
| Ship | State | Description |
| Gloire a Jesus | France | World War I: The sailing vessel was sunk in the Atlantic Ocean approximately 200 nautical miles (370 km) south west of the Isles of Scilly, United Kingdom by SM U-46 ( Imperial German Navy). |
| Hebburn | United Kingdom | World War I: The collier was torpedoed and sunk in the Atlantic Ocean 14 nautical miles (26 km) off Mine Head, Cornwall (51°40′N 7°13′W﻿ / ﻿51.667°N 7.217°W﻿ / 51.667; -7.217) by SM UB-91 ( Imperial German Navy) with the loss of six of her crew. |
| Shitomu Maru | Japan | The cargo ship sank at Shinagawa, Tokyo. |
| SM U-156 | Imperial German Navy | World War I: The Type U 151 submarine struck a mine and sank in the North Sea with the loss of all 77 crew. |
| Unknown boat | Russian Navy White Movement | Russian Civil War: The boat was shelled and damaged by Sergei ( Soviet Navy), run aground and abandoned on the Volga River. |

## 26 September

List of shipwrecks: 26 September 1918 :
| Ship | State | Description |
| Belle Brice | France | The schooner foundered in a gale at Castellón de la Plana, Spain. |
| Paul | Belgium | World War I: The coaster was torpedoed and sunk in the North Sea off Robin Hood's Bay, Yorkshire, United Kingdom (54°27′N 0°30′W﻿ / ﻿54.450°N 0.500°W﻿ / 54.450; -0.500﻿ (SS Paul)) by SM UB-21 ( Imperial German Navy). Her crew survived. |
| USCGC Tampa | United States Navy | World War I: Convoy HG 107: The Ungula-class cutter was torpedoed and sunk in the Bristol Channel 50°40′N 6°19′W﻿ / ﻿50.667°N 6.317°W﻿ / 50.667; -6.317 by SM UB-91 ( Imperial German Navy) with the loss of all hands. The numbers of the casualties vary; 131, or 111 Coast Guard, 8 US Navy and some civilian dock workers, or 112 US Navy, 10 Royal Navy and 5 dock workers. |

## 27 September

List of shipwrecks: 27 September 1918 :
| Ship | State | Description |
| En Avant | France | World War I: The sailing vessel was sunk in the Atlantic Ocean 45 nautical miles (83 km) north of Ouessant, Finistère by SM U-54 ( Imperial German Navy). |
| Hatasu | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea 50 nautical miles (93 km) north by west of Oran, Algeria (36°32′N 0°53′W﻿ / ﻿36.533°N 0.883°W﻿ / 36.533; -0.883) by SM UB-49 ( Imperial German Navy) with the loss of two of her crew. |

## 28 September

List of shipwrecks: 28 September 1918 :
| Ship | State | Description |
| Baldersby | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Irish Sea 9 nautical miles (17 km) east of the Codling Bank Lightship ( United Kingdom) by SM UB-91 ( Imperial German Navy) with the loss of two of her crew. |
| Benha | Egypt | World War I: The sailing vessel was shelled and sunk in the Mediterranean Sea off Ras el Dabas by an enemy submarine. |
| Rye Cliff | United States | The 137-foot (42 m) sidewheel paddle steamer, a ferry, was destroyed by fire while moored at a pier just off Sea Cliff Park in Sea Cliff, Long Island, New York. |
| Sarasota | United States | The dredge was blown ashore in a gale, probably at Port Sponge, Florida. The vessel was refloated the next day. |

## 29 September

List of shipwrecks: 29 September 1918 :
| Ship | State | Description |
| Libourne | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the English Channel 10 nautical miles (19 km) south of The Lizard, Cornwall (49°47′N 5°10′W﻿ / ﻿49.783°N 5.167°W﻿ / 49.783; -5.167) by SM U-54 ( Imperial German Navy) with the loss of three crew. |
| USS Minnesota | United States Navy | World War I: The Connecticut-class battleship struck a mine in the Atlantic Ocean 20 nautical miles (37 km) off the Fenwick Island Lighthouse, Delaware and was severely damaged. She was subsequently repaired and returned to service. |
| HMML 247 | Royal Navy | The motor launch was lost on this date. |
| Nyanza | United Kingdom | World War I: The cargo ship was torpedoed and sunk in the Irish Sea 10 nautical miles (19 km) north west by west of the Corsewall Lighthouse, Wigtownshire by SM UB-95 ( Imperial German Navy) with the loss of thirteen of her crew. |
| SM UB-115 | Imperial German Navy | World War I: The Type UB III submarine was depth charged and sunk in the North Sea 4.5 nautical miles (8.3 km) off Newton-by-the-Sea, Northumberland, United Kingdom (55°13′N 1°22′E﻿ / ﻿55.217°N 1.367°E﻿ / 55.217; 1.367 by HMS Ouse, HMS Star, HMT Viola (all Royal Navy) and the R23X-class airship R27 ( Royal Air Force) with the loss of all 39 crew. |

## 30 September

List of shipwrecks: 30 September 1918 :
| Ship | State | Description |
| Atlantico | Portugal | World War I: The barque was shelled and sunk in the Atlantic Ocean 6 nautical miles (11 km) west of the Bishop Rock, Isles of Scilly, United Kingdom (49°50′N 6°35′W﻿ / ﻿49.833°N 6.583°W﻿ / 49.833; -6.583) by SM UB-112 ( Imperial German Navy). |
| Francesco Padre | Italy | World War I: The sailing vessel was sunk in the Gulf of Salerno by SM UC-53 ( Imperial German Navy). |
| Gabriela Costela | Italy | World War I: The sailing vessel was sunk in the Gulf of Salerno by SM UC-53 ( Imperial German Navy). |
| Giovanni Costa | Italy | World War I: The sailing vessel was sunk in the Gulf of Salerno by SM UC-53 ( Imperial German Navy). |
| San Francesco P. | Italy | World War I: The sailing vessel was sunk in the Gulf of Salerno by SM UC-53 ( Imperial German Navy). |
| HMS Seagull | Royal Navy | The minesweeper, a converted Sharpshooter-class torpedo gunboat, collided with another vessel and sank in the River Clyde. |
| HMT Sealark II | Royal Navy | The naval trawler collided with another vessel and sank off St John's Point, County Donegal. |
| USS Ticonderoga | United States Navy | World War I: The transport ship was shelled, torpedoed and sunk in the Atlantic Ocean (43°05′N 38°43′W﻿ / ﻿43.083°N 38.717°W﻿ / 43.083; -38.717) by SM U-152 ( Imperial German Navy) with the loss of 213 of the 237 people on board, 112 crew and 101 troops. Two of the survivors were taken as prisoners of war, the rest were rescued by Moorish Prince ( United Kingdom). |
| SM U-102 | Imperial German Navy | World War I: The Type U 57 submarine struck a mine and sank in the North Sea east of the Orkney Islands, United Kingdom with the loss of all 42 crew. |
| SM UB-127 | Imperial German Navy | World War I: The Type UB III submarine struck a mine and sank in the Atlantic Ocean south of Fair Isle, United Kingdom with the loss of all 34 crew. |

## Unknown date

List of shipwrecks: Unknown date 1918 :
| Ship | State | Description |
| Blackford | United States | The cargo ship either sprung a leak 250 miles (400 km) south of Magdalena Bay on 17 September, eventually drifting ashore at Mazatlán, Mexico a total loss, or foundered 125 miles (201 km) off Cape St. Lucas in a hurricane on 26 September. |
| SM UB-104 | Imperial German Navy | World War I: The Type UB III submarine was lost in Lyme Bay on or after 17 September with the loss of all 36 crew. |