German submarine U-365 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II.

[1] The boat was built in Flensburg in 1942 and 1943, U-365 was a Type VIIC U-boat, with five torpedo tubes and a deck gun for smaller targets.

Haimar Wedemeyer, an efficient if slightly cautious officer, who worked his boat and crew up before being dispatched to the 9th Flotilla based at Bergen, Norway, from which she conducted her first three patrols.

In this region, on the 12 August, the boat spotted a small Soviet convoy and in rapid order sank a 7,540 GRT freighter and the two 625 tons minesweepers intended to protect it.

However, in orchestrating the attack the U-boat's position was revealed, and just two days later two Fairey Swordfish aircraft from 813 Squadron flying from the escort carrier HMS Campania spotted the submarine and sank her near the Lofoten Islands with bombs.