Mackinaw, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mackinaw, Illinois, United States, is not widely known for specific tourist attractions or proper nouns, as it is a small village primarily recognized for its local community and rural charm rather than major tourism landmarks. The best time to travel to Mackinaw, United States, is from June to August, with average air temperatures around 70°F (21°C) and water temperatures around 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!