Brinnon, United States offers 13 beaches perfect for sunbathing, surfing, swimming, and more. Brinnon is known for Dosewallips State Park and the nearby Olympic National Forest. The best time to travel to Brinnon, 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!