Portu Maga is found in the locality of the same name in the municipal area of Arbus. It is reached along the coast road which runs from Piscinas towards Marina di Arbus.
The beach of Portu Maga, found halfway along the magnificent Costa Verde, has averagely coarse, light-coloured sand along with a few surfacing rocks.

Its waters are of a changing blue due to the plays of light created by the sun reflecting off the sea bed. A further splash of colour is provided by the chromatic mix of the golden sand, the rocks, the brilliant blue of the sea and the carpet of typical Mediterranean brush vegetation that cloaks the hills to the rear.