Siderno, Italy offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Siderno is known for its beautiful beaches along the Ionian Sea and the nearby Aspromonte National Park. The best time to travel to Siderno, Italy, is from May to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!