This is on the southeastern part of the island and has a nice long stretch of beach. Long but not wide, St. John doesn't have much sand real estate as far as from the treeline to the water goes. You can snorkel right off the beach and if you follow the coastline on the far left side of the beach you can see big fish and decent corals. The water is calm so you can snorkel without being pushed around by the currents. This place is pretty popular so there will be tons of other snorkerers with you and there is a high chance that you'll bump into them in the water.