Washington, United States offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Washington, Wisconsin, United States, is known for the Washington Island and its lavender farms. The best time to travel to Washington, United States, is from June to September, with average air temperatures ranging from 60°F to 80°F and water temperatures around 50°F to 60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!