Belton, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Castle Rock, Washington, United States, is known for its proximity to Mount St. Helens National Volcanic Monument. The best time to travel to Belton, United States, is in late spring (April to June) when the average air temperature is around 70-80°F and water temperature is approximately 65-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
