Astrolabe is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 14 January 1971. Astrolabe.
Astrolabe
- WRENN ID
- shadowed-merlon-frost
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 14 January 1971
- Type
- Astrolabe
- Address
- Astrolabe, Portmeirion, Penrhyndeudraeth
- OS grid reference
- SH 589 371
- Coordinates
- 52.9132, -4.09938
- Source
- Cadw listing
Description
The building is an astrolabe made of metal, mounted on a Tuscan stone column, which stands on a terracotta octagonal base that comes from a 19th-century chimney. The circular plinth features an inscription that reads: "In gratitude to William Willett."
Local climate
Astrolabe 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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