East Setauket, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. East Setauket is known for the historic Three Village area, including the Setauket Presbyterian Church and the Brewster House. The best time to travel to East Setauket, United States, is in late spring (May to June) when the average air temperature is around 65-75°F and the water temperature is approximately 55-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!