Quincy, United States offers 29 beaches perfect for sunbathing, surfing, swimming, and more. Quincy, Massachusetts, United States, is known for the Adams National Historical Park, which preserves the homes of Presidents John Adams and John Quincy Adams. The best time to travel to Quincy, 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!