Mackinac Island, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mackinac Island is known for the historic Fort Mackinac, the Grand Hotel, and its ban on motor vehicles, offering horse-drawn carriage tours. The best time to visit Mackinac Island is from June to August, with average air temperatures around 70°F (21°C) and water temperatures near 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!