Eagle Harbor, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Eagle Harbor, Michigan, United States, is known for the Eagle Harbor Lighthouse and the Keweenaw Peninsula's scenic beauty. The best time to travel to Eagle Harbor, United States, is in July, when the average air temperature is around 70°F and the water temperature is approximately 60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!