Ruadh Sgeir lighthouse is a Grade C listed building in the Argyll and Bute local planning authority area, Scotland. First listed on 15 December 2020. Lighthouse.

Ruadh Sgeir lighthouse

WRENN ID
tired-brick-martin
Grade
C
Local Planning Authority
Argyll and Bute
Constituency
Argyll, Bute and South Lochaber MP: Brendan O'Hara (SNP)
Country
Scotland
Date first listed
15 December 2020
Type
Lighthouse
OS grid reference
NR 721 926
Coordinates
56.07203, -5.66267
Source
Historic Environment Scotland listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Ruadh Sgeir is a solar-powered minor light beacon that was built in 1983. It stands on a raised square concrete base, which is accessible by a concrete stair. The lighthouse features a cylindrical glass reinforced plastic (GRP) tower topped with a metal gallery and a conical-roofed lantern that has triangular-shaped storm panes and astragal bars. The automatic LED light flashes white every six seconds and has a range of eight nautical miles.

On the eastern side of the lighthouse, there are two entrance doors: one at ground level and another at balcony level. Solar panels are installed on the southern side of the structure.

Inside, the space is divided into two sections. The lower section contains electrical and communications equipment along with banks of batteries, and it has small porthole windows. The upper section houses the light.

Historically, a minor light was first established on Ruadh Sgeir in 1906 by David A and Charles Stevenson, as announced by the Northern Lighthouse Board in a Notice To Mariners on November 13, 1906. The original light was replaced by the current GRP structure in 1983, which was initially powered by acetylene gas but was converted to solar power in 2002.

Local climate

Ruadh Sgeir lighthouse sits in one of the wettest parts of the UK, with an average of 1,940 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.

It experiences an average of 9 freeze-thaw cycles a year, fewer than 92% of listed buildings. Of these, 5 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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