Santa Marinella, Italy offers 12 beaches perfect for sunbathing, surfing, swimming, and more. Santa Marinella is known for its beautiful beaches and the historic Castello di Santa Severa. The best time to travel to Santa Marinella, 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!