Sagaponack, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Sagaponack is known for its luxurious Hamptons beaches and high-profile celebrity residences. The best time to travel to Sagaponack, United States, is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!