Formia, Italy offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Formia is known for its ancient Roman ruins, including the Tomb of Cicero and the Roman Cisternone. The best time to travel to Formia, Italy, is from May 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!