Rapid River, United States offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Rapid River is known for its proximity to the beautiful beaches and outdoor recreational activities along Lake Michigan. The best time to travel to Rapid River, United States, is during the summer months of June to August, when the average air temperature ranges from 60°F to 80°F (15°C to 27°C) and the water temperature in nearby bodies like Lake Michigan is around 60°F to 70°F (15°C to 21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!