St Deiniol's Well is a Grade II listed building in the Pembrokeshire local planning authority area, Wales. First listed on 14 May 1970. House.
St Deiniol's Well
- WRENN ID
- cold-render-pine
- Grade
- II
- Local Planning Authority
- Pembrokeshire
- Constituency
- Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
- Country
- Wales
- Date first listed
- 14 May 1970
- Type
- House
- Address
- St Deiniol's Well, Penally Village, Penally
- OS grid reference
- SS 116 993
- Coordinates
- 51.66109, -4.72395
- Source
- Cadw listing
Description
St Deiniol's Well is an ancient well with historical significance, mentioned in a church advowson grant from 1301, which refers to a spring of St. Theliai. This well is traditionally identified with that spring, and its location near the Abbey ruins supports this connection.
The well is approximately circular and stone-lined, measuring about 0.9 meters in diameter. Its superstructure is constructed from local stone rubble, with patches of brick. In front of the well, there is a small paved area that is slightly lower than the level of the lane. The superstructure is open-fronted and has a horseshoe shape, standing about 2.5 meters high. It is capped with a sloping stone and features a lintel at the front.
Local climate
St Deiniol's Well sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 91% 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 5 freeze-thaw cycles a year, fewer than 97% of listed buildings. Of these, 1 follows 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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- No EPC on record for this property
- 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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