Eagle River, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Eagle River, Michigan, United States, is known for its picturesque Lake Superior shoreline and historic Eagle River Lighthouse. The best time to travel to Eagle River, 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 in nearby lakes is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!