South Kingstown, United States offers 11 beaches perfect for sunbathing, surfing, swimming, and more. South Kingstown is known for the University of Rhode Island and the South County Museum. The best time to travel to South Kingstown, United States, is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 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!