Greenwich, United States offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Greenwich, Connecticut, United States, is known for the Greenwich International Film Festival and the Bruce Museum. The best time to travel to Greenwich, United States, is in late spring (May to June) when the average air temperature is around 65-75°F and 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!