Ischia, Italy offers 12 beaches perfect for sunbathing, surfing, swimming, and more. Ischia is known for its thermal spas, Aragonese Castle, and beautiful beaches. The best time to travel to Ischia, Italy, is from May to September, when the average air temperature ranges from 70°F to 85°F and the sea temperature is between 68°F and 77°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!