HMS Carnarvon Bay was a Bay-class anti-aircraft frigate built for the Royal Navy during World War 2.

The engines produced a total of 5,500 shaft horsepower (4,100 kW) and gave a maximum speed of 20 knots (37 km/h; 23 mph).

Carnarvon Bay carried a maximum of 724 long tons (736 t) of fuel oil that gave her a range of 9,500 nautical miles (17,600 km; 10,900 mi) at 12 knots (22 km/h; 14 mph).

Built by Henry Robb of Leith, the ship was laid down on 8 June 1944 and launched on 15 March 1945 by Lady Westwood.

Deployed for training duties, she made a single voyage to Oslo in January 1946, and to Scapa Flow in February.