Hempstead, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Hempstead, New York, United States, is known for Hofstra University and its proximity to Jones Beach State Park. The best time to travel to Hempstead, United States, is in late spring (May), when the average air temperature is around 65°F (18°C) and the water temperature is approximately 55°F (13°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!