Castiadas, Italy offers 17 beaches perfect for sunbathing, surfing, swimming, and more. Castiadas is known for its stunning beaches like Cala Sinzias and Monte Turnu, as well as the former Castiadas Penal Colony. The best time to travel to Castiadas, Italy, is from May to September, with average air temperatures ranging from 70°F to 85°F and water temperatures from 68°F to 77°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!