Obervatory South of Tarn Bank is a Grade II listed building in the Cumberland local planning authority area, England. First listed on 13 December 1985. Observatory.
Obervatory South of Tarn Bank
- WRENN ID
- fading-buttress-acorn
- Grade
- II
- Local Planning Authority
- Cumberland
- Constituency
- Whitehaven and Workington MP: Josh MacAlister (Lab)
- Country
- England
- Date first listed
- 13 December 1985
- Type
- Observatory
- Address
- Obervatory South of Tarn Bank, Greysouthen
- OS grid reference
- NY 073 296
- Coordinates
- 54.65345, -3.43762
- Source
- Historic England listing
Description
The observatory south of Tarn Bank is an early 19th-century structure built from calciferous sandstone ashlar. It features a dentilled eaves cornice and is set on a rusticated plinth. The building has a lead domed cupola that is mounted on wheels for turning. It is a single-storey, circular plan with two bays and includes a rectangular porch. The entrance has a plain boarded door framed by a pilastered surround, and there are tall, narrow round-arched windows. This observatory has group value with Tarn Bank.
Local climate
Obervatory South of Tarn Bank sits in one of the wettest parts of the UK, with an average of 1,420 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 98% of listed buildings.
It experiences an average of 33 freeze-thaw cycles a year, fewer than 56% 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.
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- No sale records on file
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- 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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