Beulah, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Beulah, Michigan, United States, is known for Crystal Lake and its proximity to the Sleeping Bear Dunes National Lakeshore. The best time to travel to Beulah, United States, is in late spring or early fall when the average air temperature is around 60-70°F and the water temperature is approximately 50-60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!