Gloucester House is a former royal residence in the seaside resort of Weymouth on the south coast of England. It was the summer residence of Prince William Henry Duke of Gloucester and Edinburgh (1743–1805), fourth son of Frederick, Prince of Wales, and brother of King George III. During his recovery from porphyria in 1789, George III spent some time convalescing there.
It is now a private residence, with a large pub and restaurant on the first floor known as Moby Dicks.