Tumwater, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tumwater is known for the Tumwater Falls Park and the historic Olympia Brewing Company. The best time to travel to Tumwater, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and water temperature in nearby lakes and rivers is approximately 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!