Platte, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Platte, South Dakota, United States, is known for Lake Platte, Snake Creek Recreation Area, and the annual Missouri River Outdoor Expo. The best time to travel to Platte, United States, is in late spring or early fall when the average air temperature is around 60-70°F, and water temperatures in nearby lakes are typically 50-60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!