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Coldest sea in North America in August

5,500 coastal locations in North America ranked by typical August sea temperature, coldest first. Region-wide average in August: 21.6°C.

Coldest in August

Alert

-1.6°C August mean in Canada

Regional August average

21.6°C

across all 5,500 coastal locations in North America

Vs annual mean

+6.5°C

above the year-round regional average

What the North America sea feels like in August

Water at this temperature is very pleasant to swim in. If you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.

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 August fits in the year

August 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 August 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 August

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

# Location August mean
1 Alert Nunavut -1.6°C
2 Cape Sheridan Nunavut -1.6°C
3 Wrangel Bay Nunavut -1.5°C
4 Isachsen Nunavut -1.5°C
5 Discovery Harbour Nunavut -1.4°C
6 Airstrip Point Nunavut -1.3°C
7 Cameron Island Nunavut -1.3°C
8 Greely Fiord Nunavut -1.3°C
9 Iceberg Point Nunavut -1.1°C
10 Cape Barclay Nunavut -1.0°C
11 Dease Peninsula Nunavut -0.9°C
12 Hamilton Island Nunavut -0.8°C
13 Pim Island Nunavut -0.8°C
14 Cape Sibbald Nunavut -0.8°C
15 Entrance Island Nunavut -0.8°C
16 Crown Prince Frederick Island Nunavut -0.7°C
17 Little Cornwallis Island Nunavut -0.7°C
18 Cape Capel Nunavut -0.6°C
19 Peel Point Northwest Territories -0.5°C
20 Crown Prince Frederick Nunavut -0.3°C
21 Natkusiak Peninsula Northwest Territories -0.3°C
22 Bay of Woe Nunavut -0.1°C
23 Winter Harbour Northwest Territories -0.1°C
24 Resolute Nunavut 0.0°C
25 Cape Kater Nunavut 0.2°C
Show 25 more ▸
26 Grise Fiord Nunavut 0.2°C
27 Baffin Nunavut 0.3°C
28 False Strait Nunavut 0.3°C
29 Purfur Cove Nunavut 0.3°C
30 Lavoie Islands (Bernier Bay) Nunavut 0.4°C
31 Cape Skogn Nunavut 0.7°C
32 Beechey Island Nunavut 0.7°C
33 Erebus Bay Nunavut 0.7°C
34 Radstock Bay Nunavut 1.0°C
35 Martin Islands Nunavut 1.1°C
36 Bonne Island Nunavut 1.4°C
37 Rigby Bay Nunavut 1.4°C
38 King Charles Cape Nunavut 1.4°C
39 Fury Point Nunavut 1.5°C
40 Frobisher's Farthest Nunavut 1.5°C
41 Resor Island Nunavut 1.5°C
42 Lewis Bay Nunavut 1.6°C
43 Iqaluit Nunavut 1.6°C
44 Oscar Bay Nunavut 1.6°C
45 Iqaluit (Frobisher Bay) Nunavut 1.6°C
46 Williams Harbour Newfoundland and Labrador 1.6°C
47 Arctic Bay Nunavut 1.8°C
48 Bellot Strait East Nunavut 1.9°C
49 Port Burwell Nunavut 1.9°C
50 Fort Ross Nunavut 2.0°C

Warmest 10 in North America in August

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

# Location August mean
1 San Felipe Baja California 31.9°C
2 Lake Pleasant Arizona 31.5°C
3 Lake Powell Arizona 31.5°C
4 Phoenix Arizona 31.5°C
5 Denver Colorado 31.2°C
6 Lostmans River entrance, Florida Florida 31.1°C
7 Onion Key Bay Florida 31.1°C
8 Onion Key, Lostmans River, Florida Florida 31.1°C
9 Shark River entrance, Florida Florida 31.1°C
10 Cape Sable, East Cape, Florida Florida 31.0°C

More on this region