Swampscott, United States offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Swampscott, Massachusetts, United States, is known for its historic Olmsted Subdivision Historic District and the scenic King's Beach. The best time to travel to Swampscott, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature is approximately 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!