Portoscuso, Italy offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Portoscuso is known for its historic tonnara, the ancient tuna fishing complex, and the nearby island of San Pietro. The best time to travel to Portoscuso, 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!