Au Gres, United States offers 12 beaches perfect for sunbathing, surfing, swimming, and more. Au Gres, Michigan, United States, is known for the Au Gres River and its proximity to Saginaw Bay, which offer excellent opportunities for fishing and boating. The best time to travel to Au Gres, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature is approximately 65-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!