Custonaci, Italy offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Custonaci, Sicily, Italy, is known for the Monte Cofano Nature Reserve and the annual Living Nativity event in the Mangiapane Caves. The best time to travel to Custonaci, 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!