Whistling Cay offers a diverse underwater landscape featuring a reef, a wall, and a canyon. Located 270 metres from shore, this site is accessible by boat only. Divers can expect depths ranging from 12 to 30 metres, with an average depth of 16 metres. Conditions are generally mild, with visibility typically between 15 and 30 metres. The site is suitable for beginners, though caution is required near the reef structure to avoid sharp coral, sea urchins, jellyfish, stonefish, and sharks. A typical dive lasts 50 minutes. Ensure you arrange a boat charter in advance, as there are no on-site amenities.

Johnson's Reef is a shallow marine site located 805 metres offshore from Saint John. With depths ranging from 1 to 10 metres and an average of 6 metres, it is suitable for beginners. Divers and snorkellers can observe species including French Angelfish, Spotted Moray, Striped Parrotfish, Queen Parrotfish, Foureye Butterfly Fish, Whiptail Stingray, Reef Squid, French Grunt, Sea Bass, Yellowtail Snapper, Lizardfish, hard coral, and snails. Visibility typically spans 10 to 30 metres. Access is by boat only. Hazards include boat traffic, jellyfish, rip currents, sea urchins, sharp coral, surf, and surge. Always monitor local surge and swell conditions and use a surface marker buoy.

Trunk Cay in Saint John offers accessible shore entry to a combination of natural and artificial reef structures. The site features shallow water ranging from 1 to 5 metres, with an average depth of 3 metres, making it suitable for beginners. Divers and snorkellers can encounter French Angelfish, Spotted Moray, Great Barracuda, Nurse Shark, Wrasses, Stoplight Parrotfish, Striped Parrotfish, Blue Tang, Foureye Butterfly Fish, Flamingo Tongue, Rock Cod, Caribbean Ocean Surgeonfish, Christmas Tree Worm, and Reef Squid. Conditions include mild currents and visibility ranging from 5 to 100 metres. Water temperatures remain warm between 27 and 30C. Be cautious of sharp coral edges and occasional jellyfish.

Watermelon Cay is a reef site in Saint John, US Virgin Islands, offering depths between 2 and 15 metres with an average of 7 metres. The site features visibility ranging from 15 to 30 metres and water temperatures between 27C and 30C. Divers can access the reef via shore or boat. While currents are generally mild, they can strengthen unexpectedly, requiring careful monitoring. Sea urchins are present on the reef, so divers should exercise caution regarding hand and knee placement. The site is suited for intermediate divers who can manage variable current conditions and maintain buoyancy around the reef structure.

Little Thatch is a drift dive located 800 metres offshore from Saint John in the US Virgin Islands. The site features a reef structure that drops from 27 to 36 metres, with an average depth of 32 metres. Due to the strong currents that frequently sweep through the area, this site is accessible only by boat and is suited for intermediate divers with strong buoyancy control. Visibility varies between 10 and 30 metres. Divers should be aware of sharp coral and rock along the reef edge. Always consult your boat operator regarding current conditions before entering the water, as the drift can be intense.

Carval Rock is a reef and drift dive site located near Saint John. The topography features rock formations and swim-throughs, with depths ranging from 15 to 80 metres. Divers can observe a variety of marine life, including common sightings of Foureye Butterfly Fish, Purple Sea Fans, and Blue Tang. Other species recorded at the site include Spotted Moray, Arrow Crab, Stoplight Parrotfish, Wrasses, Atlantic Tarpon, Smooth Trunkfish, Flamingo Tongue, Pederson Cleaner Shrimp, Gray Angelfish, Pacific Trumpetfish, and Basket Starfish. Access to the site is by boat only. Conditions include mild currents and visibility between 33 and 100 metres. Hazards include deep water, overhead environments, strong currents, and surf.

Hawksnest Beach on Saint John offers a shallow reef environment suitable for beginners. The site features an average depth of 3 metres, with a range between 1 and 5 metres. Access is directly from the shore, making it convenient for both divers and snorkellers. Divers should be aware of moderate currents, surf, and potential boat traffic in the area. When navigating the reef, take care to avoid sharp coral and sea urchins. Facilities at the beach include parking, toilets, showers, and changing rooms. The site provides visibility ranging from 15 to 30 metres, with water temperatures remaining warm throughout the year.

Caneel Bay on the west coast of Saint John offers a shallow marine environment featuring a mix of coral reef and seagrass beds. Located 50 metres from the shore, the site reaches depths of 2 to 5 metres with an average of 3 metres. Conditions are generally mild with visibility ranging from 10 to 20 metres, making it suitable for beginners. Divers and snorkellers should be aware of boat traffic in the area, as well as the presence of sea urchins and sharp coral. Access is via the shore, with parking and toilet facilities available nearby. Typical dives last approximately 45 minutes.