Ruins of St Justinian's Chapel is a Grade I listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 1 March 1963. Chapel, ruin.
Ruins of St Justinian's Chapel
- WRENN ID
- inner-outpost-sunrise
- Grade
- I
- Local Planning Authority
- Pembrokeshire Coast National Park
- Constituency
- Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
- Country
- Wales
- Date first listed
- 1 March 1963
- Type
- Chapel, ruin
- Address
- Ruins of St Justinian's Chapel, Porthstinian/St Justinian'S, St. David's and the Cathedral Close
- OS grid reference
- SM 723 252
- Coordinates
- 51.8791, -5.3094
- Source
- Cadw listing
Description
The ruins of St Justinian's Chapel are a Grade I listed structure made of rubble stone, with walls that stand approximately 4 meters high and a rectangular plan measuring about 12 meters by 5 meters. The chapel is roofless, and various openings have been stripped of their ashlar frames. A corbel table runs around the building, interrupted by the head of the east window. Early descriptions indicate that the chapel once featured battlements, gables, and a small battlemented tower, all of which are now missing.
There are three windows of varying sizes on each side and two doors located at the northwest end, with the east end window appearing to be segment-headed. The sides of the chapel display segment-headed arcading that does not match, indicating a division for the chancel, which is evidenced by the presence of rood-beams and a single step up. In the chancel, there are traces of a piscina and an aumbry recess, along with a broad segmental-pointed blank arch at the end. Additionally, the southwest angle of the chapel had a stair.
Local climate
Ruins of St Justinian's Chapel sits in a wetter-than-average part of the UK, with an average of 1,050 mm of rain a year. This makes it wetter than 85% 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 3 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.
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- Detailed attributes — period, style, materials, features
- Flood risk assessment
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