Rosario Beach, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Rosario Beach, Washington, United States, is known for Deception Pass State Park. The best time to visit Rosario Beach, 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!
