HMS Tormentor was a shore establishment of the British Royal Navy during World War II, based near Warsash, on the River Hamble.

[1] Following the outbreak of World War II, the Royal Navy requisitioned the remaining part of the grounds and buildings located on the shore of the River Hamble just south of Warsash village.

This included the old Coast Guard House and RAF wireless station at Warsash, as well as the home of the Household Brigade Yacht Club.

[7] Douglas Fairbanks Jr. undertook intensive training at HMS Tormentor in 1942, which provided some lessons in tactics that would eventually assist his founding of the US Beach Jumpers.

[8] On 13 August 1942, Major Herbert Hasler and Captain J. D. Stewart visited HMS Tormentor to attend a demonstration of fast motorboat training, in preparation for Operation Frankton.