Cuchía beach, Coastal beach in Miengo, Spain.

Cuchía is a sandy beach along the Cantabrian coast featuring moderate waves and natural dune formations backing the shoreline. The beach extends for several hundred meters and provides varied areas for swimming and exploring.

Cuchía beach lies on the right bank of the San Martín de la Arena estuary, at its mouth, about one kilometre from the village of Cuchía in the municipality of Miengo. The opposite bank belongs to Suances, so the inlet separates the two municipalities. The surrounding area later gained the Cuchía quarry interpretation park, created on land restored after quarrying.

The beach takes its name from the village of Cuchía, about a kilometre inland in the municipality of Miengo; it is also called Playa de Marzán. Bathers reach the opposite shore of Suances across the ría, a crossing local practice treats with caution because of the current. Behind the sand, saltwater lagoons and a vegetated strip border the dune system.

Access ramps for people with disabilities lead down to the sand, and the car park reserves spaces for them. Showers, telephones and a lifeguard post stand on site, and a promenade runs along the beach. The beach is about 1 km from the village of Cuchía; across the ría lies Suances, reachable by swimming but risky because of the current.

The ría de San Martín de la Arena separates Cuchía beach from Suances on the opposite bank; the source notes that swimming across to the other beach is possible but can be dangerous because of the inlet's current. The beach lies about one kilometre from the village of Cuchía, in the municipality of Miengo.