Louisville, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Louisville, Tennessee, United States, is known for its proximity to Fort Loudoun Lake and the scenic beauty of the Great Smoky Mountains. The best time to travel to Louisville is in May, when the average air temperature is around 70°F (21°C) and the Ohio River water temperature is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!