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Coldest sea in United States in March

4,477 coastal locations in United States ranked by typical March sea temperature, coldest first. Region-wide average in March: 11.3°C.

Coldest in March

Point Hope

-1.7°C March mean in United States

Regional March average

11.3°C

across all 4,477 coastal locations in United States

Vs annual mean

-4.9°C

below the year-round regional average

What the United States 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.

United States monthly average 10.0°C to 22.6°C
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  • Warmest month August 22.6°C
  • Coldest month February 10.0°C
  • Annual mean 16.2°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 United States month rankings:

United States sea temperature map (live)

The map shows today's latest reading at every United States 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 United States 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 Point Hope Alaska -1.7°C
2 Savoonga, St. Lawrence Island Alaska -1.7°C
3 Northeast Cape, St. Lawrence Island Alaska -1.7°C
4 Kivalina Alaska -1.7°C
5 Maknik Lagoon entrance, St. Lawrence Island, Alaska Alaska -1.7°C
6 Fossil River entrance, St. Lawrence Island, Alaska Alaska -1.6°C
7 Moghoweyik River entrance, St. Lawrence Island, Alaska Alaska -1.6°C
8 Outside Lopp Lagoon Alaska -1.6°C
9 Cape Espenberg, Kotzebue Sound Alaska -1.6°C
10 Cape Krusenstern, Kotzebue Sound Alaska -1.6°C
11 Powooiliak Point, St. Lawrence Island, Alaska Alaska -1.6°C
12 Akeftapak, St. Lawrence Island Alaska -1.6°C
13 Red Dog Dock Alaska -1.6°C
14 Tin City, Bering Sea Alaska -1.6°C
15 Nome, Norton Sound Alaska -1.6°C
16 Shishmaref Inlet 2 Alaska -1.6°C
17 Eastern Nunivak Island Alaska -1.6°C
18 Kotzebue, Kotzebue Sound Alaska -1.6°C
19 Lost River, Seward Peninsula Alaska -1.6°C
20 Mekoryuk, Mekoryuk River Entrance Alaska -1.6°C
21 Goodhope Bay, Kotzebue Sound Alaska -1.6°C
22 Flaxman Island Alaska -1.6°C
23 Nome Alaska -1.6°C
24 Prudhoe Bay #2 Alaska -1.6°C
25 Kinak Bay Alaska -1.5°C
Show 25 more ▸
26 Point Spencer, Port Clarence, Norton Sound Alaska -1.5°C
27 Tooksook Bay, Nelson Island Alaska -1.5°C
28 Kotzebue Alaska -1.5°C
29 Prudhoe Bay Alaska -1.5°C
30 St. Matthew Island, Bering Sea, Alaska Alaska -1.5°C
31 Popokamute (Kokokamute), Kuskokwim River Alaska -1.5°C
32 Barter Island Alaska -1.5°C
33 Deering, Kotzebue Sound Alaska -1.5°C
34 Dall Point, Hooper Bay Alaska -1.5°C
35 Fort Peck Lake Montana -1.5°C
36 Helmick Point (SE of), Kuskokwim River Alaska -1.5°C
37 Popokamute, Alaska Alaska -1.5°C
38 Cape Romanzof, Bering Sea, Alaska Alaska -1.5°C
39 Kokechik Bay, Bering Sea, Alaska Alaska -1.5°C
40 Cross Island (Dinkum Sands) Alaska -1.5°C
41 Teller, Port Clarance, Norton Sound, Alaska Alaska -1.5°C
42 Teller, Port Clarence Alaska -1.5°C
43 Apokak Creek entrance, Alaska Alaska -1.4°C
44 Black, Black River, Bering Sea, Alaska Alaska -1.4°C
45 Eek Channel, off Quinhagak, Alaska Alaska -1.4°C
46 Kuskokwak Creek entrance, Alaska Alaska -1.4°C
47 Clarks Point, Nushagak Bay Alaska -1.4°C
48 Kiwalik, Kotzebue Sound, Alaska Alaska -1.4°C
49 Barrow Alaska -1.4°C
50 Lake Sakakawea North Dakota -1.4°C

Warmest 10 in United States in March

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

# Location March mean
1 Palmyra Island Northern Line Islands 28.0°C
2 Howland Island Minor Outlying Islands 27.6°C
3 Jarvis Island Minor Outlying Islands 26.9°C
4 Wake Island, Pacific Ocean Minor Outlying Islands 26.5°C
5 Johnston Atoll, Pacific Ocean Minor Outlying Islands 26.1°C
6 Johnston Atoll Minor Outlying Islands 26.1°C
7 Long Island New York 25.8°C
8 Boynton Beach Florida 25.7°C
9 Briny Breezes Florida 25.7°C
10 Hypoluxo Florida 25.7°C

More on this region