Shelton, United States offers 19 beaches perfect for sunbathing, surfing, swimming, and more. Shelton is known for the Olympic National Forest and the annual Mason County Forest Festival. The best time to travel to Shelton, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature is approximately 60-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!