St. Twynnell's Church is a Grade II* listed building in the Pembrokeshire local planning authority area, Wales. First listed on 14 May 1970. A Medieval Church.

St. Twynnell's Church

WRENN ID
shifting-bastion-saffron
Grade
II*
Local Planning Authority
Pembrokeshire
Constituency
Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
Country
Wales
Date first listed
14 May 1970
Type
Church
Period
Medieval
Address
St. Twynnell's Church, St. Twynnells, Stackpole and Castlemartin
OS grid reference
SR 949 975
Coordinates
51.63967, -4.96473
Source
Cadw listing

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

Description

St. Twynnell's Church is a Grade II* listed building featuring sandstone masonry, with some sections constructed in large courses for the nave and tower, while other areas are in random rubble. The western and northern parts are partially rendered, and the church has slate roofs with 19th-century verge parapets.

The tower is built in two stages and sits at the west end of the nave vault, showcasing the substantial nature of the nave vault. The lower stage above the nave has a rough vault that spans east to west and includes a window facing east. The upper stage features a steep corbelled dome covered with slate, which is concealed by the parapet. There are louvred belfry openings on the north, east, and south sides, and a stair turret located in the southwest corner of the tower. The tower parapet is supported by corbels, and a similar corbelled detail, though less pronounced, is found at the top of the stair turret.

The nave is unusually long and narrow, measuring approximately 17 meters by 5 meters, and has a tall pointed vault. There is a blocked remnant of the north transept, while both the south transept and the porch are vaulted and open fully to the nave. A squint connects the south transept to the chancel. The chancel arch, enlarged in the 19th century, is designed in two orders. The chancel features a timber roof with scissor beams and includes a vestry to the north with a large stone chimney. The east window is a three-light design, and other windows throughout the church have been restored in a lancet style. The chancel floor is laid with Minton encaustic tiles that display the arms of Lord Cawdor. Additionally, there is an undecorated Norman font of the cushion type, supported by a short pillar with a base.

Local climate

St. Twynnell's Church sits in a wetter-than-average part of the UK, with an average of 1,140 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 98% of listed buildings.

It experiences an average of 2 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.

More on this building

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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 1 transaction since 2023
  • No related consent applications matched
  • 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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