Rosignano Solvay Castiglioncello, Italy offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rosignano Solvay Castiglioncello is known for its stunning White Beaches and the charming Castiglioncello Promontory. The best time to travel to Rosignano Solvay Castiglioncello, Italy, is from June 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!