Castel Volturno, Italy offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Castel Volturno is known for the Volturno River, the Domitiana coastline, and the nearby Castel Volturno Nature Reserve. The best time to travel to Castel Volturno, Italy, is from May to September, with average air temperatures ranging from 70°F to 85°F and water temperatures from 70°F to 80°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!