Kelleys Island, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Kelleys Island is known for the Glacial Grooves, Kelleys Island State Park, and the Kelleys Island Wine Co. The best time to visit Kelleys Island is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!