

Best for intermediate divers, Up to 14m, boat entry, variable current.
Castle Reef is a finger reef formation located off the East Coast of Saint Thomas. The site is situated within a marine preserve and is surrounded by sand flats. Divers can explore depths reaching 14 metres. Access to this site is by boat only, as there are no mooring buoys. Conditions are variable, with visibility ranging from 60 to 100 metres and water temperatures between 27C and 30C throughout the year. The site is rated for intermediate divers. Caution is advised due to the presence of sharp coral throughout the reef structure.
18.31299, -64.85126
Local tips coming soon
Boat access required for dive sites around St. Thomas, Buck Island, and Capella Island.
Recorded at this site
Depth
Up to 14m
Visibility
60-100m
Skill Level
Intermediate
Entry
Boat
Boat required
Water Temp
27-30°C
Current
Variable
No, this site is rated for intermediate divers.
The site reaches a maximum depth of 14 metres.
Castle Reef requires boat access as there are no mooring buoys at the site.
Snorkelling is not recommended at this site, which holds a 1/5 rating for the activity.
Water temperatures range from 27C in the cooler months to 30C in September and October.
Diving at Castle Reef in Charlotte Amalie requires the following certifications: Open Water. Always dive within your training limits.
A rashguard or 2mm shorty is recommended for diving at Castle Reef in Charlotte Amalie. Water temperatures range from 27°C to 30°C.
Divers at Castle Reef in Charlotte Amalie should be aware of sharks. These encounters are generally rare and avoidable with proper awareness. Follow local safety guidance and maintain a respectful distance from all marine life.