Parsippany Troy Hills, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Parsippany Troy Hills, New Jersey, United States, is known for its proximity to historical sites and natural parks, offering a suburban retreat with access to outdoor activities and cultural attractions. The best time to travel to Parsippany-Troy Hills is in late spring (May), when the average air temperature is around 65°F (18°C) and water temperature in nearby lakes is 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!