Nettuno, Italy offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Nettuno is known for the Sanctuary of Our Lady of Grace and St. Maria Goretti, Forte Sangallo, and its beautiful beaches. The best time to travel to Nettuno, Italy, is from May to September, with average air temperatures ranging from 70°F to 85°F and water temperatures from 70°F to 78°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!