Portici, Italy offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Portici is known for the Royal Palace of Portici and the Herculaneum archaeological site. The best time to travel to Portici, 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!