Tertenia, Italy offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Tertenia is known for its beautiful beaches and stunning natural landscapes. The best time to travel to Tertenia, Italy, is from May to September, with average air temperatures ranging from 70-85°F (21-29°C) and water temperatures around 70-77°F (21-25°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!