Bacoli, Italy offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Bacoli is known for the ancient Roman archaeological site of Baiae and the stunning Phlegraean Fields. The best time to travel to Bacoli, 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!