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Coldest sea in North America in December

5,500 coastal locations in North America ranked by typical December sea temperature, coldest first. Region-wide average in December: 11.6°C.

Coldest in December

Dundas Harbour

-1.7°C December mean in Canada

Regional December average

11.6°C

across all 5,500 coastal locations in North America

Vs annual mean

-3.6°C

below the year-round regional average

What the North America 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.

North America monthly average 9.3°C to 21.6°C
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  • Warmest month August 21.6°C
  • Coldest month February 9.3°C
  • Annual mean 15.2°C
  • Months above 20°C 3 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 North America month rankings:

North America sea temperature map (live)

The map shows today's latest reading at every North America 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 North America 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 Dundas Harbour Nunavut -1.7°C
2 Grise Fiord Nunavut -1.7°C
3 Barrow Alaska -1.7°C
4 Iceberg Point Nunavut -1.7°C
5 Cameron Island Nunavut -1.7°C
6 Radstock Bay Nunavut -1.7°C
7 Wrangel Bay Nunavut -1.7°C
8 Airstrip Point Nunavut -1.7°C
9 Point Barrow, Alaska Alaska -1.7°C
10 Point Barrow Alaska -1.7°C
11 Barrow (offshore) Alaska -1.6°C
12 Beechey Island Nunavut -1.6°C
13 Cape Sheridan Nunavut -1.6°C
14 Erebus Bay Nunavut -1.6°C
15 Alert Nunavut -1.6°C
16 Hamilton Island Nunavut -1.6°C
17 Pim Island Nunavut -1.6°C
18 Rigby Bay Nunavut -1.6°C
19 Cape Capel Nunavut -1.6°C
20 Cape Kater Nunavut -1.6°C
21 Milne Inlet Nunavut -1.6°C
22 Pisiktarfik Island Nunavut -1.6°C
23 Discovery Harbour Nunavut -1.6°C
24 Fury Point Nunavut -1.6°C
25 Whale Cove Nunavut -1.6°C
Show 25 more ▸
26 Cambridge Bay Nunavut -1.6°C
27 Cape Krusenstern, Kotzebue Sound Alaska -1.6°C
28 Norton Island Nunavut -1.6°C
29 Sévigny Point Nunavut -1.6°C
30 Cape Espenberg, Kotzebue Sound Alaska -1.6°C
31 Marble Island Nunavut -1.6°C
32 Sachs Harbour Northwest Territories -1.6°C
33 Prudhoe Bay #2 Alaska -1.6°C
34 Chesterfield Inlet Nunavut -1.6°C
35 Panorama Island Nunavut -1.6°C
36 Rankin Inlet Nunavut -1.6°C
37 Flaxman Island Alaska -1.6°C
38 Goodhope Bay, Kotzebue Sound Alaska -1.6°C
39 Resolute Nunavut -1.5°C
40 Ulukhaktok Northwest Territories -1.5°C
41 Kotzebue, Kotzebue Sound Alaska -1.5°C
42 Red Dog Dock Alaska -1.5°C
43 Isachsen Nunavut -1.5°C
44 Martin Islands Nunavut -1.5°C
45 Kivalina Alaska -1.5°C
46 Cape Skogn Nunavut -1.5°C
47 Little Cornwallis Island Nunavut -1.5°C
48 Prudhoe Bay Alaska -1.5°C
49 Cape Barclay Nunavut -1.5°C
50 Cape Parry Northwest Territories -1.5°C

Warmest 10 in North America in December

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

# Location December mean
1 Acapulco Guerrero 29.4°C
2 Puerto Chiapas Chiapas 29.4°C
3 Maldonado Guerrero 29.3°C
4 Tecoanapa Guerrero 29.3°C
5 Ixtapa Guerrero 29.3°C
6 Zihuatanejo Guerrero 29.3°C
7 Acapulco-C,Gro. Guerrero 29.2°C
8 Troncones Guerrero 29.2°C
9 Lazaro Cardenas Michoacan 29.1°C
10 Zihuatenajo,Gro. Guerrero 29.1°C

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