The Lighthouse is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 23 August 2002. Lighthouse.

The Lighthouse

WRENN ID
steep-wattle-bramble
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
23 August 2002
Type
Lighthouse
Address
The Lighthouse, Portmeirion, Penrhyndeudraeth
OS grid reference
SH 586 367
Coordinates
52.90914, -4.10362
Source
Cadw listing

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

Description

The Lighthouse is a small cylindrical tower made of sheet metal, topped with an upturned pig boiler that forms a dome. Between these features are latticed lights with dividing volutes, and the entire structure is crowned with an ornate metal finial. The tower is set on a wider circular platform made of rubble, which has a railed balustrade and an arched entrance.

Local climate

The Lighthouse sits in one of the wettest parts of the UK, with an average of 1,490 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 97% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 60% of listed buildings. Of these, 15 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°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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