Diving is possible year-round in Cornwall but July to October offers the widest variety of sea life. Falmouth Bay is a popular destination with shore dives from beaches such as Castle Beach & Silver Steps, and wreck diving at the infamous Mannacles Reef where the SS Mohegan ran aground and sank in 1898 with the loss of its 106 crew. The 146m-long site requires at least three dives to cover, features rock stacks covered in jewelled anemones and is home to dogfish and anglerfish. A more recent wreck is HMS Scylla. Sunk in 2004 by the National Marine Aquarium in Whitsand Bay to create an artificial reef, it was rapidly colonized and is now home to around 270 marine species.
By contrast the Quies are large islands off Trevose Head, north of Newquay, where the waters are rich with starfish, spider crabs, dahlia anemones and sea squirts. Night dives offer sightings of lobster, crabs and octopus and the visibility at locations such as Trevelgue Head in Newquay Bay is good enough for photography.
Disabled divers will find the facilities, beach and water at the Porthkerris Dive Centre on the Lizard Peninsula are accessible for those with reduced mobility and the centre also has instructors qualified to assist disabled divers.