Sullivan, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Sullivan, Indiana, United States, is known for the Sullivan County Park and Lake, a popular destination for outdoor recreation and camping. The best time to travel to Sullivan, United States, is in late spring (May to June) when the average air temperature is around 65-75°F and water temperature is approximately 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
