Deiva Marina, Italy offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Deiva Marina is known for its beautiful beaches and proximity to the Cinque Terre. The best time to travel to Deiva Marina, Italy, is from June to September, when the average air temperature is around 75°F (24°C) and the sea 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!