Union Township, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Union Township, Indiana, United States, is not particularly known for travel and beach tourism. The best time to travel to Union Township, United States, is in late spring (May to June) when the average air temperature is around 60-75°F, and water temperatures in nearby lakes or rivers are typically cooler, around 50-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!