Yet, head a few miles inland and the chances are the skies will clear and temperatures will shoot up.
Here are 15 ideas of things to do and places to go to escape the fog.
9. Cheviot Hills
The Cheviots straddle the Anglo-Scottish border, with Cheviot itself peaking at 815m. Now while that is only for the dedicated, there are lots more family friendly walks in the foothills such as Harthope and College Valley. Always be prepared for bad weather. Photo: Stuart Cobley
10. Leisure centres
Active Northumberland has leisure centres across the county including in Alnwick (pictured), Berwick, Morpeth, Ashington, Blyth, Hexham and Cramlington. Photo: NOP
11. Hirsel, Coldstream
Straying over the border to Coldstream, The Hirsel estate is lovely at this time of year with its displays of azaleas and rhodonedrons. There are pleasant walks, picnic tables, a cafe and a small park. Photo: Stuart Cobley
12. Paxton House
Paxton House occupies a wonderful spot on the northern bank of the River Tweed some five miles from Berwick. The grand Georgian house is interesting to look around and its grounds are wonderful. There's also a fine play park for the kids and a cafe. Photo: STUART COBLEY