Grant Township, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Grant Township, Michigan, United States, is known for the Keweenaw Rocket Range and the Estivant Pines Nature Sanctuary. The best time to travel to Grant Township, United States, is in July when the average air temperature is around 70°F (21°C) and the water temperature is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!