Winthrop Harbor, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Winthrop Harbor is known for North Point Marina, the largest marina on the Great Lakes, attracting boating and fishing enthusiasts. The best time to travel to Winthrop Harbor is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature in Lake Michigan 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!
