Brewster, United States offers 31 beaches perfect for sunbathing, surfing, swimming, and more. Brewster, Massachusetts, United States, is known for the Cape Cod Museum of Natural History and the historic Brewster Store. The best time to travel to Brewster, United States, is in late spring or early fall when the average air temperature is around 60-70°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!