Church of St. Cwyfan is a Grade II* listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 5 April 1971. A Medieval Church.

Church of St. Cwyfan

WRENN ID
former-cupola-kestrel
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
Period
Medieval
Address
Church of St. Cwyfan, Porth Cwyfan, Aberffraw
OS grid reference
SH 335 682
Coordinates
53.18553, -4.4919
Source
Cadw listing

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

Description

The Church of St. Cwyfan is a simple Medieval church with an undivided chancel and nave. It is constructed of rubble masonry with gritstone dressings and features a modern slate roof with rendered copings. At the west gable, there is a single opening gabled bellcote from the 14th or 15th century, which has a pointed opening. The west end of the south wall includes a 15th-century doorway, characterized by a depressed, pointed-arched opening in a square frame with a moulded hoodmould. The doorway has casement moulded jambs and weathered trefoils in the spandrels.

To the east of the doorway, the south wall has a projecting string, likely from the 12th century, which is interrupted by the doorway. There is a single square-headed light to the east of the door, which terminates towards the center of the south wall, and at the east end, there is a cinquefoil-headed light in a square frame with a moulded hoodmould. The north wall features an arcade of three 4-centred arches, which are now blocked and obscured. The central bay contains a re-set late 14th or early 15th-century window, a cinquefoil-headed light in a square frame. The east window is a mutilated pointed-arched 14th-century window with a hoodmould, retaining only some of its original tracery.

The interior of the church could not be inspected during the survey, but details have been recorded in the RCAHM Inventory and in articles by Longueville Jones and Hughes in Archaeologia Cambrensis. In the early 19th century, an additional aisle to the north was removed, leaving the dividing arcade of three 4-centred arches embedded in the north wall of the current church. These arches are in a Perpendicular style, consisting of two orders: the inner is plain, while the outer is hollow-chamfered, supported by octagonal piers and semi-octagonal responds with weathered caps and bosses. The arches are now blocked, and the inner orders are obscured. There are stone benches at the west end of the church and along part of the south wall. The roof, likely from the late 16th century, has undergone significant repairs and features exposed arch-braced trusses. The church is said to contain several 18th-century memorials.

Local climate

Church of St. Cwyfan 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.

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  6. Aberffraw Calvinistic Methodist Chapel Grade II 2.0 km
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  8. Seion Methodist Chapel, including railings to forecourt Grade II 2.0 km
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