HMS Widemouth Bay (K615) was a Bay-class anti-aircraft frigate of the British Royal Navy, named for Widemouth Bay in Cornwall. The ship was ordered from Harland and Wolff at Belfast on 2 February 1943 as a to be named Loch Frisa and laid down on 26 April 1944 as Admiralty Job Number J3917. During construction the contract was changed, and the ship was completed as a Bay-class frigate and named Widemouth Bay on 5 October 1944. Launched on 19 October, she was completed on 13 April 1945, the first of her class to be completed.