HMS Weymouth was a 44-gun fifth rate of the Royal Navy. She was previously the merchantman Wellesley, built in Calcutta in 1796. She successfully defended herself against a French frigate, and made two voyages to Britain as an East Indiaman for the East India Company. The Admiralty purchased her in May 1804; she then became a storeship in 1806. On her last voyage for the Royal Navy, in 1820, she carried settlers to South Africa. She was then laid up in ordinary. In 1828, she was converted to a prison ship and sailed to Bermuda where she served as a prison hulk until 1865 when she was sold for breaking up.