Sunset, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sunset, South Carolina, United States, is known for Lake Keowee and the Jocassee Gorges. The best time to travel to Sunset, United States, is during late spring or early fall when the average air temperature is around 70°F (21°C) and water temperature is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!