Church of St Mwrog is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 5 April 1971. Church.
Church of St Mwrog
- WRENN ID
- kindled-footing-plover
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 5 April 1971
- Type
- Church
- Address
- Church of St Mwrog, Llanfwrog, Holyhead, Llanfaethlu
- OS grid reference
- SH 301 838
- Coordinates
- 53.32466, -4.55151
- Source
- Cadw listing
Description
The Church of St Mwrog is a 19th-century church designed in the late Perpendicular style. It features a nave with three bays, a west gable bellcote, and a southwest gabled porch, along with a shorter and narrower chancel that includes a north vestry. The structure is constructed from local rubble masonry with freestone dressings, topped with a modern slate roof featuring narrow courses below a slate ridge and stone copings.
The nave is supported by offset angled buttresses at the east end, and a single gabled bellcote is located at the west end, above reset weathered facial stops at the apex of the gable. The east gables are adorned with weathered trefoil finials. The windows throughout the church include a mix of one, two, and three trefoil-headed lights with arched heads. The chancel has similarly styled windows with flat heads, and its east window features three trefoil-headed lights with Perpendicular tracery in a pointed arch, complete with a hoodmould that terminates in facial label stops. Access to the church is provided through the southwest porch, which has chamfered arches for both the outer and inner doorways, and a boarded inner door with ornate floriate hinges. The west wall of the porch contains a single pointed-arched window. The vestry includes a pointed arched door in the west wall and a rectangular window with paired lights under a relieving arch in the north wall.
Inside, the nave boasts a roof of five bays with exposed rafters and purlins, featuring king post trusses with braces that extend down to wall posts resting on simple shaped corbels. The chancel roof is a single bay with exposed collared rafters and is raised by two steps, leading to a simple chancel arch with stop-chamfered angles. The sanctuary is defined by a simple timber rail supported by twisted iron stanchions with floriate brackets. All fittings are from the 19th century, likely contemporary with the church's construction. At the west end of the nave, there is an octagonal font believed to be medieval but has been re-dressed. Additionally, a late 19th-century slate memorial tablet is located on the north wall, and an early 20th-century bronze memorial tablet is found on the south wall.
Local climate
Church of St Mwrog sits in a wetter-than-average part of the UK, with an average of 1,030 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.
It experiences an average of 8 freeze-thaw cycles a year, fewer than 93% 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.
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