Which US Virgin Island is best for scuba diving?

St. Croix is the best US Virgin Island for scuba diving by a clear margin. The island sits on its own bank south of the Puerto Rican shelf, with a wall — the Cane Bay Wall — dropping from 30 feet to over 13,000 feet within swimming distance of the beach. Add the Frederiksted pier night dive (seahorses, octopus, dozens of species clustered on the pilings) and the Buck Island Reef National Monument, and St. Croix punches well above its size. St. John ranks second on protected park dives off Trunk Bay and Waterlemon Cay. St. Thomas comes third — fine reef diving at Cow Rock and the WIT Shoal wreck, but more crowded and choppier. A USVI yacht charter making all three islands sees the diving range first-hand. USVI charter routes map the sites.