Chapin, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Chapin, South Carolina, United States, is known for its proximity to Lake Murray, a popular destination for boating and fishing. The best time to travel to Chapin, United States, is in late spring (May), when the average air temperature is around 75°F (24°C) and the water temperature in nearby Lake Murray 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!