The light was established in 1831 by Robert Stevenson. The position is at latitude 58 degrees north, further north than Moscow. The light is flashing (4) White every 30 seconds. The tower is of white stone, 20m high. There are 51 steps and 9 ladder steps up to the top of the lighthouse tower.
Dunnet Head Lighthouse marks the most northerly point of the Scottish mainland – being some 2.35 miles North of John o Groats. Only 6.75 miles across the Pentland Firth lies the nearest point of the Orkney Islands. Erosion of the rock on which the original fog signal (built in 1899( stood, made it necessary to abandon it and to establish another fog signal nearer the lighthouse.
Information kindly supplied by the Northern Lighthouse Board, Edinburgh. You can read more in the book “Corners of Caithness – Dunnet”.