Santu Antiogu, Italy offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Santu Antiogu, Sardinia, Italy, is known for the ancient Phoenician settlement of Sulky and the Basilica di Sant'Antioco Martire. The best time to travel to Santu Antiogu, Italy, is from May to September, with average air temperatures ranging from 70°F to 85°F and water temperatures from 68°F to 77°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!