Beach of A Madalena, Rock beach in San Martiño de Porto, Spain.

Beach of A Madalena is a 1,000-metre white, fine-sand beach at the mouth of the Eume river, in the parish of San Martiño do Porto, Cabanas. It lies at the bottom of the Ares estuary, beside a pine grove and a pedestrian promenade. The beach has calm, shallow water and is classed as urban, with a private nautical club and hospitality venues on the sand.

From the early 20th century the Cabanas council banned vehicles from the pine grove behind the sand and limited access to it, building a pedestrian promenade along the road that skirts the trees. From the 1960s the area saw heavy, largely unregulated building, from single-family houses to apartment blocks. The beach lies at the mouth of the Eume, on the Ares estuary.

The beach sits at the mouth of the Eume river, next to the pine grove and the Ares estuary. A private nautical club on the sand runs sailing courses and keeps moorings for small boats, and the pedestrian promenade along the road bordering the pines holds the beach's bars and restaurants. Since 2020 the 150 metres between the southern breakwater and the first footbridge are set aside as a dog beach, the only stretch of sand and pine grove where dogs are allowed.

The beach is urban and very busy because of its proximity to Ferrol, A Coruña and Pontedeume. A promenade runs along the road bordering the pine grove, with hospitality venues and a private nautical club on the sand. Access is direct from the AP-9 motorway, and the Cabanas station is nearby. Since 2020, dogs are allowed only on the 150 metres at the southern end, between the breakwater and the first footbridge.

The northern section of this beach features fine white sand, while the southern portion is dominated by natural rock formations that rise from the shore. These two distinct zones let visitors experience quite different coastal environments without traveling far.