Water visibility is usually 23-38 metres and the water temperature averages over 21°C, which makes good snorkelling and scuba diving, from beaches or boats.
Wreck Alley on Proselyte Reef, has several wrecks which can be explored on one dive. HMS Proselyte is a 200 year-old British frigate (mostly broken up and covered in coral, although cannons and anchors are visible), while The Minnow and SS Lucy are modern ships deliberately sunk as dive sites. Diving the east side of the island is recommended in good weather, either from the shore or drift diving from a boat. The coral barrier reef is undamaged by silt run off and there are lots of fish, fed by Atlantic currents.
Dive Centres: Training with NAUI instructors or just equipment rental is offered by Leeward Island Divers (T43320), Ocean Explorers at Simpson Bay (T45252), Trade Winds Dive Center at Great Bay Marina (T75176, PADI and SSI certification also offered, US$45 single tank 15 metres dives 0900, 1100, 1300 Monday-Friday, 1000, 1300 Saturday, Sunday).