Seabrook Island, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Seabrook Island is known for its pristine beaches and wildlife-rich natural habitats. The best time to travel to Seabrook Island is from April to June, with average air temperatures ranging from 70°F to 85°F and water temperatures from 65°F to 75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!