Turtle Cove, United States Virgin Islands offers 1 beach perfect for sunbathing, surfing, swimming, and more. Stonington, Connecticut, United States, is known for the Stonington Borough, Mystic Seaport Museum, and the Old Lighthouse Museum. The best time to visit Turtle Cove, United States Virgin Islands, is from December to April, with average air temperatures around 77-82°F and water temperatures about 79-82°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!