Playa de San Cidiello, Protected beach in Oviñana, Spain.

Playa de San Cidiello is a protected coastal area along the Asturian shore, stretching for about 850 meters with sandy sections framed by steep rocky cliffs at each end. The beach surface features dark sand composed of silica, quartzite, and slate particles, interspersed with scattered pebbles throughout.

The cove lies within the Costa Occidental de Asturias, a stretch listed as a Protected Landscape, a Special Protection Area for Birds (ZEPA) and a Site of Community Importance (LIC). These designations stem from the cliffs and islets around Cabo Vidio, the largest islet being Ballenato, which shelter the beach and its marine life.

The beach lies below Cabo Vidio, whose lighthouse marks the eastern end of the cove and looks out on the islets, the largest called Ballenato. Bathers are absent: the sources record no services and name only spearfishing and rod fishing as possible activities, reached by a slippery descent.

Access is via an unmarked path leading from Oviñana village through vegetation, with no vehicle roads reaching the beach. Wear sturdy footwear and allow extra time for the walk, especially during wet weather or when vegetation is dense.

From the Cabo Vidio lighthouse the eastern side of the cove and its cliffs are visible, along with a group of small islets whose largest is called Ballenato. The descent to the sand begins beside the electricity pylon closest to the sea, a landmark that is easy to pick out on the nearby horizon.