Fonmon Well is a Grade II listed building in the Vale of Glamorgan local planning authority area, Wales. First listed on 30 September 2004. Well.

Fonmon Well

WRENN ID
waiting-keystone-amber
Grade
II
Local Planning Authority
Vale of Glamorgan
Constituency
Vale of Glamorgan MP: Kanishka Narayan (Lab)
Country
Wales
Date first listed
30 September 2004
Type
Well
Address
Fonmon Well, Barry, Rhoose
OS grid reference
ST 047 675
Coordinates
51.39932, -3.37053
Source
Cadw listing

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

Description

Fonmon Well is a structure featuring a domed stone roof. The entrance is made of dressed limestone, which has a keyed arched head and a coping that is partially missing. Inside, there is an arched stone vault.

Local climate

Fonmon Well sits in a wetter-than-average part of the UK, with an average of 1,160 mm of rain a year. This makes it wetter than 89% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 13 freeze-thaw cycles a year, fewer than 87% of listed buildings. Of these, 5 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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  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. Walls surrounding Fonmon Pond including the Bridge and Weir and Well at Fonmon Grade II 27 m
  2. East Hall (aka Rosedene) Grade II 109 m
  3. Watchtower at Fonmon Castle Grade II* 364 m
  4. Stable Block at Fonmon Castle Grade II 445 m
  5. Retaining Walls of South Garden at Fonmon Castle Grade II 448 m
  6. Fonmon Castle Grade I 507 m
  7. Walls of Walled Gardens at Fonmon Castle Grade II 559 m
  8. Kenson Bridge Grade II 1.2 km
  9. Cliff Farmhouse Grade II 1.4 km
  10. The Granary Grade II 1.5 km