Capel Seilo, with forecourt walls is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 18 May 1999. Chapel.
Capel Seilo, with forecourt walls
- WRENN ID
- muted-merlon-ivory
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 18 May 1999
- Type
- Chapel
- Address
- Capel Seilo, with forecourt walls, Nant Gwrtheyrn, Pwllheli, Pistyll
- OS grid reference
- SH 350 448
- Coordinates
- 52.97516, -4.45841
- Source
- Cadw listing
Description
Capel Seilo is a simple Calvinistic Methodist chapel built in 1878, situated on a platform levelled from the hillside. Constructed of stone that is rendered and lined out, it features a slate roof. The chapel, which accommodates 130 people, has a main gabled front facing west. This front includes two boarded doors with round fanlights and two round-headed windows between them, with all the joinery having been renewed. The pediment above contains an arched niche with a slate slab inscribed "SEILO A.D. 1878." The side elevations are unrendered and have three similar windows. An ample forecourt is enclosed by stone walls.
Inside, the roof consists of three bays, with the trusses ceiled at collar level and finished with acoustic tiles. The chapel has slate window sills and a small pulpit. The interior underwent significant modernization around 1978 and features a carpeted floor.
Local climate
Capel Seilo, with forecourt walls sits in one of the wettest parts of the UK, with an average of 1,710 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.
It experiences an average of 7 freeze-thaw cycles a year, fewer than 95% of listed buildings. Of these, 2 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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- No EPC on record for this property
- No sale records on file
- 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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