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Coldest sea in United Kingdom in December

914 coastal locations in United Kingdom ranked by typical December sea temperature, coldest first. Region-wide average in December: 10.1°C.

Coldest in December

Annan

7.4°C December mean in United Kingdom

Regional December average

10.1°C

across all 914 coastal locations in United Kingdom

Vs annual mean

-1.9°C

below the year-round regional average

What the United Kingdom sea feels like in December

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

United Kingdom monthly average 8.1°C to 16.5°C
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  • Warmest month August 16.5°C
  • Coldest month February 8.1°C
  • Annual mean 12.0°C
  • Months above 20°C 0 of 12

Where December fits in the year

December sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve United Kingdom month rankings:

United Kingdom sea temperature map (live)

The map shows today's latest reading at every United Kingdom location. The list below is based on the typical December mean.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest United Kingdom locations in December

Sorted by typical December mean from a decade of daily readings, coldest first. Click any place for the full location page.

# Location December mean
1 Annan Dumfries and Galloway 7.4°C
2 Glasson Cumbria 7.4°C
3 Torduff Point Dumfries and Galloway 7.4°C
4 King's Lynn Norfolk 7.4°C
5 New Hunstanton Norfolk 7.4°C
6 West Stones Norfolk 7.4°C
7 Wisbech Cambridgeshire 7.4°C
8 Galgate Lancashire 7.6°C
9 Lancaster Lancashire 7.6°C
10 Preston Lancashire 7.6°C
11 River Lune Lancashire 7.6°C
12 Bassenthwaite Lake Cumbria 7.6°C
13 Buttermere Cumbria 7.6°C
14 Crummock Water Cumbria 7.6°C
15 Derwentwater Cumbria 7.6°C
16 Gretna Scotland 7.6°C
17 Maryport Cumbria 7.6°C
18 Rydal Water Cumbria 7.6°C
19 Ullswater Cumbria 7.6°C
20 Windermere Cumbria 7.6°C
21 Heacham Norfolk 7.7°C
22 Hunstanton Norfolk 7.7°C
23 Kirkconnell Dumfries and Galloway 7.7°C
24 Southerness Point Dumfries and Galloway 7.7°C
25 Flimby England 7.9°C
Show 25 more ▸
26 Silloth England 7.9°C
27 Whitehaven Cumbria 7.9°C
28 Brancaster Norfolk 8.0°C
29 Arnside Cumbria 8.0°C
30 Blackpool Lancashire 8.0°C
31 Cleveleys Lancashire 8.0°C
32 Coniston Water Cumbria 8.0°C
33 Fleetwood Lancashire 8.0°C
34 Grange-over-Sands Cumbria 8.0°C
35 Grasmere Cumbria 8.0°C
36 Heysham Lancashire 8.0°C
37 Lytham St Annes Lancashire 8.0°C
38 Morecambe Lancashire 8.0°C
39 Barrow (Ramsden Dock) Cumbria 8.0°C
40 Halfway Shoal Northamptonshire 8.0°C
41 Haws Point Cumbria 8.0°C
42 Roa Island Cumbria 8.0°C
43 Ulverston Cumbria 8.0°C
44 Norwich Norfolk 8.2°C
45 Skegness England 8.2°C
46 Connahs Quay Flintshire 8.2°C
47 Hilbre Island Merseyside 8.2°C
48 Liverpool Merseyside 8.2°C
49 New Ferry Merseyside 8.2°C
50 Runcorn England 8.2°C

Warmest 10 in United Kingdom in December

Same data the other way. The warmest spots for the same month.

# Location December mean
1 Hallsands Devon 12.5°C
2 Lannacombe Beach Devon 12.5°C
3 Prawl Devon 12.5°C
4 Start Point Devon 12.5°C
5 Hope Cove Devon 12.4°C
6 Salcombe Devon 12.4°C
7 Maseline Pier Channel Islands 12.4°C
8 Beesands Devon 12.4°C
9 Blackpool Devon 12.4°C
10 Blackpool Sands Devon 12.4°C

More on this region