Basin, Slip and Outlet Walls at Seaton Sluice is a Grade II listed building in the Northumberland local planning authority area, England. First listed on 15 July 1987. Harbour walls.

Basin, Slip and Outlet Walls at Seaton Sluice

WRENN ID
sacred-storey-clover
Grade
II
Local Planning Authority
Northumberland
Constituency
Cramlington and Killingworth MP: Emma Foody (Lab)
Country
England
Date first listed
15 July 1987
Type
Harbour walls
Address
Basin, Slip and Outlet Walls at Seaton Sluice, Seaton Valley
OS grid reference
NZ 337 767
Coordinates
55.08394, -1.47325
Source
Historic England listing

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

Description

The basin, slip, and outlet walls at Seaton Sluice are harbour walls originally built around 1660 by Sir Ralph Delaval, with later alterations and repairs. They are made of squared stone and feature revetment walls with various iron mooring rings. At the landward end of the basin, there are the abutments of the old bridge, and the lower courses show a slot for a sluice gate installed in 1690, which was used to build up the head of water for scouring out silt from the harbour. The port was superseded by Blyth in the 19th century, with the last shipment of coal occurring in 1861. The site is listed for its historical interest.

Local climate

Basin, Slip and Outlet Walls at Seaton Sluice receives an average of 770 mm of rain a year. This makes it drier than 63% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 80% of listed buildings.

It experiences an average of 22 freeze-thaw cycles a year, fewer than 77% of listed buildings. Of these, 12 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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