South Bass Island, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. South Bass Island is known for Perry's Victory and International Peace Memorial. The best time to travel to South Bass Island, United States, is from June to August, with average air temperatures around 75°F (24°C) and water temperatures near 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!