St John's Well is a Grade II listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 26 April 1977. Well.
St John's Well
- WRENN ID
- errant-oriel-thrush
- Grade
- II
- Local Planning Authority
- Pembrokeshire Coast National Park
- Constituency
- Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
- Country
- Wales
- Date first listed
- 26 April 1977
- Type
- Well
- Address
- St John's Well, Tenby
- OS grid reference
- SN 130 008
- Coordinates
- 51.67486, -4.70506
- Source
- Cadw listing
Description
St John's Well is marked by a small marble plaque inscribed in black lead capitals that reads: 'Under this stone is St John’s Well for many centuries the sole water supply of the inhabitants of Tenby'. The plaque is set within a gabled surround made of tooled grey limestone, which sits atop a rubble stone retaining wall.
Local climate
St John'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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