St Non's Well is a Grade II* listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 1 March 1963. Well.

St Non's Well

WRENN ID
silent-render-oak
Grade
II*
Local Planning Authority
Pembrokeshire Coast National Park
Constituency
Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
Country
Wales
Date first listed
1 March 1963
Type
Well
Address
St Non's Well, St. David's and the Cathedral Close
OS grid reference
SM 751 243
Coordinates
51.87245, -5.26837
Source
Cadw listing

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

Description

St Non's Well is a Grade II* listed holy spring traditionally believed to have emerged at the birth of Saint David and has been a site of pilgrimage since medieval times. The well features a small rectangular stone basin set in low rubble, enclosed by a tunnel-vaulted well-house that is open at the west end. Inside the basin, there is a step leading into the water at the west end and a ledge at the east end. The interior is whitewashed. A purple sandstone front step includes an incised run-off channel leading to a secondary small rectangular basin, which is made of monolithic sandstone and also has a run-off channel at the front. There are cobbled small paved steps on each side.

Local climate

St Non's Well sits in a wetter-than-average part of the UK, with an average of 1,050 mm of rain a year. This makes it wetter than 85% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.

It experiences an average of 3 freeze-thaw cycles a year, fewer than 99% 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.

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