Antigua & Barbuda is a is a snorkeler's dream especially for those who enjoy diving the wrecks. There are many hidden coves that contain lovely beaches that open onto clear, calm waters populated by beautiful tropical fish. The marine life offshore is particularly dense making snorkeling particularly rewarding.
The Bahamas has more than 1,100 dive sites and Stella Maris Reef is considered the best dive site in the Bahamas for "shark watching".
Bonaire and Bonaire Marine Park is a world-class diving destination so apply to its snorkeling is popular as well. Snorkelers can wade from the shores off their hotels to the reefs and view an array of coral and colorful fish.
The British Virgin Islands is home to the "RMS Rhone", which sank in a storm in 1867. It just might be the most famous and picturesque shipwreck in the world.
Diving or Snorkeling in the Cayman Islands, especially the Stingray City on Grand Cayman is where you can "swim with the Rays". These gentle stingrays glide around you in the warm, crystal-clear waters as they feed on the Atlantic Salmon.
Curacao has more than 60 locations for diving and snorkeling. Curacao Underwater Marine Park, the best-known of the snorkeling sites stretch for 12 miles along Curacao's southern coastline that is filled with sunken ships, gardens of hard and soft coral, and millions of fish.
Dominicia offers warm natural underwater springs year round.
Puerto Rico offers diving spots to as deep as 1,500 feet.
The best snorkeling on the island of St. Martin lies on the French side, where the government protects the calm waters, which are populated with schools of brilliantly colored fish. Explore the shallow reefs along its shores, especially in the northeastern underwater nature reserve.
Every island in The Grenadines offers great snorkeling possibilities right off magnificent white-sand beaches. In most places you'll have the waters to yourself.
Tobago's northeast coast offers crystal clear waters to interact with gentle Manta's who allow close interaction and the ability to hitch a ride on one of "Tobago's Taxis." Buccoo Reef on Tobago is especially noteworthy.
Turks and Caicos, is not only one of the premier dive sites in the world, it also provides a number of fine snorkeling possibilities. Caicos Cays and Grace Bay are the places to be. The TCI reefs provide easy access to the stunningly beautiful world of coral gardens, the most dramatic in the vast area immediately south of the Bahamas.
There is great snorkeling and diving opportunities in the US Virgin Islands. Those Include Buck Island, St. Croix, on the north shorewhere more than 250 species of fish, as well as a variety of sponges, corals, and crustaceans, have been found at this 840-acre island and reef system. The reef is strictly protected by the U.S. National Park Service.
Cane Bay, also in St. Croix, is one of the best diving and snorkeling sites on St. Croix. On a clear day, you can swim out about 450 ft. and see the Cane Bay Wall that drops off dramatically to deep waters below. Multicolored fish and brain coral abound.
Trunk Bay, St John's offers a self-guided trail has large underwater signs that identify species of coral and other items of interest. The beach has showers, changing rooms, equipment rentals, and a lifeguard on duty.
Haulover Bay, St. John's is a favorite with the locals. The snorkeling is dramatic, with ledges, walls, nooks, and sandy areas set close together. Only about 600 ft. of land separates the Atlantic Ocean from the Caribbean Sea.
Coki Point Beach, St. Thomas, offers excellent snorkeling, especially around the coral ledges near Coral World's underwater tower, a favorite with cruise-ship passengers.