Northeast of Charlotte Amalie and northwest of Red Hook, the snorkeling at Sapphire Beach is popular dive site since there is a reef close to the beach. When snorkeling at Sapphire Beach, you can expect to see spotted eagle rays, turtles and other marine life. The marine life includes trumpetfish, squirrelfish, beaugregory, four-eyed butterflyfish, blue tang, trunkfish, grunts and parrotfish. The best snorkeling is to the righthand side of the beach where there are staghorn coral formations. There are a few interesting reefs to explore to the far left as well. Grass beds popular with the rays and turtles dominate the center of the beach area.
To reach the snorkeling at Sapphire Beach from Red Hook, head north on SR38 (Smith Bay Road) for a mile or so. Turn right heading north into the Sapphire Beach Resort and park at the marine docks. Do not leave valuables unattended on this beach. To reach the snorkeling on St Thomas by air, fly into Cyril E King Airport (STT) which is located on the west side of the Charlotte Amalie port city. There are direct flights from Miami, NYC, Houston, San Francisco and San Juan, Puerto Rico. In addition, there are inter-island flights from neighboring Caribbean islands, such as from Cape Air. Alternately, there are regular ferry services from Charlotte Amalie to nearby islands of St John, Virgin Gorda (BVI) and Tortola (BVI). The best snorkeling on St Thomas is during the months of May through July when the surf is most calm and the visibility is highest. In case you are in need of a snorkeling tour or snorkel gear, you can check out one of these dive shops including Red Hook Dive Center, Coki Dive Center or Admiralty Dive Center.
Overall, Sapphire Beach is the 1st most popular snorkel dive spot of all 8 snorkeling dives in St Thomas.