Platja del Cavaió, Mediterranean beach in Arenys de Mar, Spain.

Platja del Cavaió is a semi-urban sand beach on the Maresme coast, shared between Arenys de Mar and Canet de Mar: 1,500 m long (1,000 m in Arenys, 500 m in Canet) and 80 to 120 m wide. Its very coarse sand slopes moderately into the water. A small breakwater separates it from Canet beach to the east, and Arenys port bounds it to the west.

This beach developed alongside the rise of Arenys de Mar as a major fishing community in the region. It has kept its role as a natural coastal point and remains connected to the town's maritime past.

The adjacent port remains the center of fishing traditions here. Local fishermen supply fresh catches directly to area restaurants and markets, keeping maritime culture active in daily life.

The beach runs 1,500 m between Arenys de Mar's port to the west and a small breakwater separating it from Canet de Mar to the east, with 1,000 m in Arenys and 500 m in Canet. A busy natural promenade runs parallel to the sand. In summer a fenced 750 m² dog area opens on the Canet side near the Arenys boundary, with direct access to the sea.

The beach features coarse sand that creates specific habitats for local plants and marine life. This sand composition is typical of protected coastal zones in this region.