Summit Hill, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Summit Hill, Pennsylvania, United States, is known for the historic Switchback Railroad, one of the first roller coasters in America. The best time to travel to Summit Hill, United States, is in late spring (May to June) when the average air temperature is around 60-70°F and water temperature in nearby lakes is approximately 55-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!