Morningstar Bay, United States Virgin Islands offers 1 beach perfect for sunbathing, surfing, swimming, and more. Morningstar Bay, Saint Thomas, United States Virgin Islands, is known for its stunning Morningstar Beach and proximity to the vibrant Charlotte Amalie. The best time to travel to Morningstar Bay, 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!