Tre Fontane, Italy offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tre Fontane is known for its beautiful beaches and proximity to the archaeological site of Selinunte. The best time to travel to Tre Fontane, Italy, is from May to September, with average air temperatures ranging from 70°F to 85°F and water temperatures from 70°F to 80°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!