Plage de Kerhillio, Coastal beach in Erdeven, Morbihan, France.

Plage de Kerhillio is a beach on the Atlantic coast at Erdeven in Morbihan, about 400 km west-southwest of Paris. The sand runs along the shore facing the open ocean, and the local climate is mild, with about 11 °C average temperature and roughly 1,150 mm of rain a year, heaviest in December.

Plage de Kerhillio lies on the Atlantic coast of Erdeven, in Morbihan. The surrounding area is known for its megalithic remains, including the nearby alignments of Kerzerho and the Carnac stones, erected in the Neolithic period. The beach itself is a natural sandy shore with no recorded built history.

Kerhillio is the main beach of Erdeven, a commune known for its megalithic alignments at Kerzerho and Crucuno a few kilometres inland. The name is Breton: Ker- is a common prefix for a hamlet or place, and the beach is the coastal outlet of the Kerhillio locality. Surf schools and kite-surfing clubs use the western end, where the swell is steadiest.

The beach is easily accessible on foot most days and offers broad open space for walking and exploring. Visitors should pay attention to tides, as these affect the usable areas and safety when entering the water.

Kerhillio sits about 400 km west-southwest of Paris on the northern coast, in Erdeven, Morbihan. The local climate is classified as savanna-type, with roughly 11 °C average temperature and about 1,147 mm of rain a year, December being the wettest month at around 133 mm.