Charleston, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Charleston, Utah, United States, is known for its proximity to Deer Creek State Park and the scenic Heber Valley. The best time to travel to Charleston is in the spring (March to May) when the average air temperature is around 65-75°F and the water temperature is approximately 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!