Union Springs, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Union Springs, New York, United States, is known for its proximity to Cayuga Lake and the historic Frontenac Island. The best time to travel to Union Springs, United States, is in the spring (April to June) when the average air temperature is around 70°F (21°C) and the nearby water bodies are approximately 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!