It is administratively a part of Aydıncık ilçe (district) of Mersin Province at 36°08′19″N 33°21′55″E / 36.13861°N 33.36528°E / 36.13861; 33.36528.

The uninhabited island has an area of only 650 square metres (7,000 sq ft).

It is almost merged to the mainland (Anatolia) and close to the Aydıncık Cave a famous cave.

Aydıncık Islands are about 1,400 metres (4,600 ft) to the west.

Yelkenli Island is known as a breeding location of Mediterranean gull and Mediterranean monk seal.