The Jam Pot is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 26 April 1999. Coastguard lookout.

The Jam Pot

WRENN ID
odd-quartz-clover
Grade
II
Local Planning Authority
Cornwall
Constituency
Camborne and Redruth MP: Perran Moon (Lab)
Country
England
Date first listed
26 April 1999
Type
Coastguard lookout
Address
The Jam Pot, Gwinear-Gwithian
OS grid reference
SW 581 415
Coordinates
50.22425, -5.39258
Source
Historic England listing

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

Description

The Jam Pot is a coastguard lookout building from the early 19th century, constructed of painted stone rubble. It features a tarred and cement slurried scantle slate conical roof and has a circular single-cell plan. This small single-storey structure has two pointed, almost round arch windows on the west side and a doorway on the east side. Attached to the east is a single-storey wing built around the mid-20th century. Inside, there is one room that is open to the roof, with rafters meeting at the apex, although it is now ceiled under the rafters. The building is depicted as a coastguard lookout on the 1876 Ordnance Survey map.

Local climate

The Jam Pot receives an average of 910 mm of rain a year. This makes it wetter than 68% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.

It experiences an average of 4 freeze-thaw cycles a year, fewer than 98% 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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