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Coldest sea in North America in March

5,500 coastal locations in North America ranked by typical March sea temperature, coldest first. Region-wide average in March: 10.3°C.

Coldest in March

Cameron Island

-1.8°C March mean in Canada

Regional March average

10.3°C

across all 5,500 coastal locations in North America

Vs annual mean

-4.8°C

below the year-round regional average

What the North America sea feels like in March

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 March fits in the year

March 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 March 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 March

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

# Location March mean
1 Cameron Island Nunavut -1.8°C
2 Dundas Harbour Nunavut -1.7°C
3 Frobisher's Farthest Nunavut -1.7°C
4 Grise Fiord Nunavut -1.7°C
5 Iqaluit Nunavut -1.7°C
6 Resor Island Nunavut -1.7°C
7 Iqaluit (Frobisher Bay) Nunavut -1.7°C
8 Lewis Bay Nunavut -1.7°C
9 Milne Inlet Nunavut -1.7°C
10 Pisiktarfik Island Nunavut -1.7°C
11 Airstrip Point Nunavut -1.7°C
12 Port Burwell Nunavut -1.7°C
13 Point Hope Alaska -1.7°C
14 Ashe Inlet Nunavut -1.7°C
15 Iceberg Point Nunavut -1.7°C
16 Savoonga, St. Lawrence Island Alaska -1.7°C
17 Hamilton Island Nunavut -1.7°C
18 Radstock Bay Nunavut -1.7°C
19 Sachs Harbour Northwest Territories -1.7°C
20 Northeast Cape, St. Lawrence Island Alaska -1.7°C
21 Beechey Island Nunavut -1.7°C
22 Cape Dalhousie Northwest Territories -1.7°C
23 Erebus Bay Nunavut -1.7°C
24 Wrangel Bay Nunavut -1.7°C
25 Brevoort Harbour Nunavut -1.7°C
Show 25 more ▸
26 Doctor Island Nunavut -1.7°C
27 Pangnirtung Nunavut -1.7°C
28 Sugluk Québec -1.7°C
29 Kivalina Alaska -1.7°C
30 Maknik Lagoon entrance, St. Lawrence Island, Alaska Alaska -1.7°C
31 Cape Capel Nunavut -1.6°C
32 Cape Parry Northwest Territories -1.6°C
33 Lake Harbour Nunavut -1.6°C
34 Whale Cove Nunavut -1.6°C
35 Fossil River entrance, St. Lawrence Island, Alaska Alaska -1.6°C
36 Moghoweyik River entrance, St. Lawrence Island, Alaska Alaska -1.6°C
37 Outside Lopp Lagoon Alaska -1.6°C
38 Deception Bay Quebec -1.6°C
39 Rigby Bay Nunavut -1.6°C
40 Cape Espenberg, Kotzebue Sound Alaska -1.6°C
41 Cape Krusenstern, Kotzebue Sound Alaska -1.6°C
42 Powooiliak Point, St. Lawrence Island, Alaska Alaska -1.6°C
43 Hopedale Newfoundland and Labrador -1.6°C
44 Marble Island Nunavut -1.6°C
45 Norton Island Nunavut -1.6°C
46 Akeftapak, St. Lawrence Island Alaska -1.6°C
47 Red Dog Dock Alaska -1.6°C
48 Cape Kater Nunavut -1.6°C
49 Cape Sheridan Nunavut -1.6°C
50 Fury Point Nunavut -1.6°C

Warmest 10 in North America in March

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

# Location March mean
1 Puerto Chiapas Chiapas 29.1°C
2 Puerto Arista Chiapas 28.8°C
3 Brisas de Zicatela Oaxaca 28.6°C
4 Puerto Escondido Oaxaca 28.6°C
5 Mazunte Oaxaca 28.5°C
6 San Agustinillo Oaxaca 28.5°C
7 Zipolite beach Oaxaca 28.5°C
8 Pochutla Oaxaca 28.3°C
9 Puerto Angel Oaxaca 28.3°C
10 Maldonado Guerrero 28.2°C

More on this region