Montalto di Castro, Italy offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Montalto di Castro is known for its proximity to the archaeological site of Vulci and the beautiful beaches of Marina di Montalto. The best time to travel to Montalto di Castro, Italy, is from May to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!