Inisheer Lighthouse, Maritime beacon on Inisheer Island, Ireland

Inisheer Lighthouse stands on Fardurris Point at the southern tip of Inisheer, the smallest Aran Island. Its limestone tower, built of ashlar masonry, is painted white with a broad black band and carries a lantern room at a focal height of 34 metres. Two keeper's houses stand close by, and the light shows white or red depending on direction, with a red sector between 245° and 269° marking Finnis Rock.

The lighthouse started operating in 1857 as a replacement for an older beacon on nearby Inishmore that had not worked well enough to protect ships in the dangerous waters around the Aran Islands. It has since served as a steady navigation marker on these challenging coastal waters.

The lighthouse takes its Irish name, Teach Solais Inis Oírr, from the island itself, and islanders also call the headland Fardurris Point. Its red sector is aimed at Finnis Rock, a hazard known to local sailors. The tower and its two keeper's houses are recorded in the National Inventory of Architectural Heritage.

The tower and site stand on Fardurris Point at the southern tip of Inisheer and are closed to the public apart from occasional open days. The light is monitored by an attendant living some distance away via radio link, so there is no keeper on site to admit visitors.

The lighthouse carries a RACON radar beacon that transmits the letter K in Morse code, detectable up to 13 nautical miles away. Its red sector, between 245° and 269°, warns ships off Finnis Rock. The 2014 LED installation replaced the 1913 Chance Brothers optic rather than keeping it in use.