Diano Marina, Italy offers 8 beaches perfect for sunbathing, surfing, swimming, and more. Diano Marina is known for its beautiful sandy beaches and the Church of Sant'Antonio Abate. The best time to travel to Diano Marina, 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!