Sundial to rear of Glynllifon House is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 8 September 1998. Sundial.
Sundial to rear of Glynllifon House
- WRENN ID
- wild-string-smoke
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 8 September 1998
- Type
- Sundial
- Address
- Sundial to rear of Glynllifon House, Llandwrog
- OS grid reference
- SH 457 554
- Coordinates
- 53.07365, -4.30464
- Source
- Cadw listing
Description
The sundial located at the rear of Glynllifon House is a large structure made of cast iron. It features a gnomon that is supported by a 4-meter high Ionic column, which is similar to those that support the pentice in the kitchen courtyard. The gnomon rises diagonally from the ground and measures approximately 7 meters in length, extending in a northerly direction. At the base of the sundial, there is a circular timber dial faced in tinplate, where the degrees were originally marked, although these markings have now faded. It is likely that there was also a designated area of ground for taking readings, but this area has since become overgrown.
A stone plaque is fixed to the back wall of the house, near the conservatory, which provides important information for interpreting the sundial. The plaque is inscribed with the following message: "Correction - To find Greenwich Mean Time add to the hours and minutes indicated by the sun-dial the number of minutes corresponding to the day of the month below for longitude 4 .18. west," followed by a table of figures.
Local climate
Sundial to rear of Glynllifon House sits in one of the wettest parts of the UK, with an average of 1,370 mm of rain a year. This makes it wetter than 97% 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 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 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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Nearby listed buildings
- Glynllifon
- Fountain near south-west corner of Glynllifon House
- Fountain pool including iron pipe in Coed y Terrace wood south-west of the Farm
- Bridge over Afon Llifon to south-east of Glynllifon House
- Bridge over Afon Llifon to south of Glynllifon House
- Fountain Pool to east of Stable Courtyard
- Rubble-walled rear service drive to west of Glynllifon House
- Rubble-walled trackway to north of service drive to west of Glynllifon House
- Footbridge over service drive to west of Glynllifon House
- Footbridge over Afon Llifon to east of house