Marina di Grosseto, Italy offers 1 beach perfect for sunbathing, surfing, swimming, and more. Marina di Grosseto is known for its beautiful beaches along the Tyrrhenian Sea and its proximity to the Maremma Natural Park. The best time to travel to Marina di Grosseto, 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!