Truro, United States offers 24 beaches perfect for sunbathing, surfing, swimming, and more. Truro, Massachusetts, United States, is known for the Cape Cod National Seashore and the Highland Light. The best time to travel to Truro, United States, is in late summer, around August, when the average air temperature is about 70°F (21°C) and the water temperature is approximately 68°F (20°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!