Grosseto, Italy offers 13 beaches perfect for sunbathing, surfing, swimming, and more. Grosseto is known for the Medici Fortress and the nearby Maremma Natural Park. The best time to travel to Grosseto, Italy, is from May to September, with average air temperatures ranging from 20°C to 30°C (68°F to 86°F) and average sea temperatures between 20°C and 25°C (68°F to 77°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!