New Carlisle, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. New Carlisle, Indiana, United States, is known for the historic Heston Steam Museum. The best time to travel to New Carlisle, 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!