Fort Gratiot Township, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Fort Gratiot Township is known for the Fort Gratiot Lighthouse, which is the oldest operating lighthouse in Michigan. The best time to travel to Fort Gratiot Township 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 Huron 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!