Porto di Cagliari lies at the head of Rada di Cagliari, entered between La Maddalena (39°09′3N, 9°01′5E) and Capo Sant’ Elia, 6. 5 miles ENE. Rada di Cagliari occupies the head of Golfo di Cagliari on the S coast of Sardegna, fronting the city of Cagliari.