Johnswood, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Johnswood is known for the Great Lakes Maritime Museum and the annual Johnswood Jazz Festival. The best time to travel to Johnswood, United States, is in late spring (May), when the average air temperature is around 70°F (21°C) and the water temperature is approximately 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!