Mercer Island, United States offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Mercer Island is known for Luther Burbank Park and its scenic views of Lake Washington. The best time to travel to Mercer Island is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the water temperature in Lake Washington is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
