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.

Tunnels of Thatch is a reef and canyon site located off Saint John. The topography features distinct canyon structures that divers navigate in depths ranging from 16 to 24 metres. Conditions are generally mild with visibility between 10 and 30 metres. Access is by boat only, and divers should be prepared for potential surge and swell. While the site is suitable for beginners, divers must remain alert for boat traffic when surfacing and wear protective footwear to avoid injury from sharp coral and rocks. Species recorded around this area include green sea turtles, nurse sharks, French angelfish, and various parrotfish and wrasses.

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.

New Found Bay, located at The Caves in the British Virgin Islands, is a shallow reef dive suitable for beginners. The site maintains a consistent depth of 3 metres, offering a calm environment for those building underwater confidence. Visibility typically ranges from 10 to 30 metres, with water temperatures between 27 and 30 degrees Celsius. Access is by boat only. Divers should exercise caution regarding sharp coral and rocks, and remain vigilant for boat traffic in the area. Always deploy a safety sausage upon ascent and stay close to the vessel.

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.

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.

Le Duc, located off Saint John, offers a combination of open reef diving alongside cave and cavern exploration. The site reaches depths between 15 and 27 metres, with an average depth of 21 metres. Divers should be prepared for boat-only access and mild currents. Visibility typically ranges from 10 to 30 metres, allowing for clear navigation of the terrain. The cavern sections require intermediate buoyancy control to avoid contact with sharp coral and rock walls. Divers should remain aware of potential jellyfish during entry and exit. Typical dive times are approximately 50 minutes, with water temperatures remaining warm throughout the year.