Church of St Dwynwen is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 5 February 1952. Church. 1 related planning application.

Church of St Dwynwen

WRENN ID
stony-frieze-bittern
Grade
II
Local Planning Authority
Isle of Anglesey
Constituency
Ynys Môn MP: Llinos Medi (PC)
Country
Wales
Date first listed
5 February 1952
Type
Church
Address
Church of St Dwynwen, Llanddwyn Island, Rhosyr
OS grid reference
SH 386 627
Coordinates
53.13752, -4.41288
Source
Cadw listing

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

Description

The Church of St Dwynwen is a cruciform plan church with foundations and parts of the southeast transept and the southwest corner of the nave still remaining. It is constructed of rubble with brown sandstone dressings. The southeast transept has the most complete remains, with its southeast wall still standing above the height of the window.

Local climate

Church of St Dwynwen sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% 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 11 freeze-thaw cycles a year, fewer than 90% of listed buildings. Of these, 3 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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  • No EPC on record for this property
  • No sale records on file
  • Related listed building consents — 1 application
  • 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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