Suquamish, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Suquamish is known for the Suquamish Museum and the Chief Seattle's Grave. The best time to travel to Suquamish, United States, is during the summer months of June to August, when the average air temperature is around 70°F (21°C) and the water temperature is approximately 55°F (13°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!