Saint Thomas offers a varied dive portfolio built around reef, wreck, pinnacle, and wall sites, with options spanning beginner-friendly shallows to advanced drop-offs. Shore entry at Coki Point Beach and Secret Harbor contrasts with the boat-access majority, including the deliberately sunk General Rogers and the complex terrain at French Cap. The Blue Tang, Stoplight Parrotfish, and Foureye Butterfly Fish appear across nearly every site, while Green Sea Turtle, Great Barracuda, Nurse Shark, and Spotted Moray reward slower, more attentive dives. Water stays warm year-round, with the clearest, calmest conditions concentrated from December through April.
Monthly water temperature across Saint Thomas's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperature remains warm throughout the year, rising to its peak in September and October and cooling only slightly toward January through March, which still stays comfortable. The best-months data points firmly toward December through April as the prime window, when calmer conditions and stronger visibility favour boat trips to exposed sites like French Cap Pinnacle and Buck Island Point. The summer and early autumn months are quieter and warmer but can bring less settled weather.
23 operators
Charlotte Amalie, US Virgin Islands
Charlotte Amalie, US Virgin Islands
19 more sites to explore
Water temperature around Saint Thomas ranges from about 27°C in January to 30°C in September, based on satellite sea-temperature data for its dive sites.
With water around 27–30°C, a rash guard or 3mm shorty works in Saint Thomas year-round.
Fin maps 31 sites in Saint Thomas (26 scuba diving sites and 4 snorkelling spots, with some suited to both).
Observation-backed species seen across Saint Thomas sites include the Blue Tang, Stoplight Parrotfish, Foureye Butterfly Fish, Queen Parrotfish, and Smooth Trunkfish on almost every reef. Signature species such as the Green Sea Turtle, Great Barracuda, Queen Angelfish, Spotted Moray, Brazilian Reef Octopus, and Fairy Basslet reward patient divers. Whiptail Stingray and Nurse Shark are also regularly recorded, alongside Groupers and Wrasses throughout the site network.
A large proportion of Saint Thomas sites are rated for beginners, including shore-entry options at Coki Point Beach and Secret Harbor as well as shallower boat-access sites such as Coral World, Cow Rock, and Cartanza Senora. Intermediate sites like Buck Island Point and Coral Bowl add challenge as skills grow. Advanced divers have French Cap Pinnacle and French Cap, which feature walls and deep drop-offs.
The majority of dive sites in Saint Thomas require a boat, and several operators including St. Thomas Dive Center, JJ Divers St Thomas, and Admiralty Dive Center run regular trips. Shore entry is available at Coki Point Beach and Secret Harbor, both of which are well suited to independent divers and those looking to avoid a boat crossing. Coral World also offers both shore and boat access.
Saint Thomas has several wreck options covering a wide range of experience levels. The Cartanza Senora lies in three pieces at shallow depth and is accessible to beginners, while the General Rogers offers both a very shallow version and a deeper intermediate dive on the same wreck structure. Packet Rock combines a wreck with a pinnacle and surrounding reef, making it a compact multi-feature site. Reef dives such as French Cap and Buck Island Point tend to offer more complex topography and stronger marine life coverage.