Isabella, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Isabella, Michigan, United States, is not particularly known for travel and beach tourism. The best time to travel to Isabella, United States, is during the summer months of June to August, when the average air temperature ranges from 70°F to 80°F (21°C to 27°C) and water temperatures in nearby lakes are typically around 65°F to 75°F (18°C to 24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!