Skip to content
seatemperatures.net

Warmest sea in Canada in August

829 coastal locations in Canada ranked by their typical August sea temperature. Region-wide average in August: 14.4°C. The top of the list is where to find the warmest swimming this month.

Warmest in August

Colchester

24.6°C August mean in Canada

Regional August average

14.4°C

across all 829 coastal locations in Canada

Vs annual mean

+7.4°C

above the year-round regional average

What the Canada sea feels like in August

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.

Canada monthly average 1.8°C to 14.4°C
J
F
M
A
M
J
J
A
S
O
N
D
  • Warmest month August 14.4°C
  • Coldest month February 1.8°C
  • Annual mean 7.0°C
  • Months above 20°C 0 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 Canada month rankings:

Canada sea temperature map (live)

The map shows today's latest reading at every Canada location. The list below is based on the typical August mean, useful for trip planning weeks or months ahead.

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 warmest Canada locations in August

Sorted by the typical August mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# Location August mean
1 Colchester Ontario 24.6°C
2 Pelee Island Ontario 24.6°C
3 Point Pelee Ontario 24.6°C
4 Mitchell's Bay Ontario 24.1°C
5 Chatham-Kent Ontario 24.1°C
6 Fort Erie Ontario 23.7°C
7 Crystal Beach Ontario 23.6°C
8 Port Stanley Ontario 23.5°C
9 Port Colborne Ontario 23.5°C
10 Port Burwell Ontario 23.5°C
11 Long Point Ontario 23.4°C
12 Port Rowan Ontario 23.4°C
13 Turkey Point Ontario 23.4°C
14 Port Dover Ontario 23.3°C
15 Leamington Ontario 23.2°C
16 St. Clair River (Port Lambton) Ontario 23.2°C
17 Windsor Ontario 23.2°C
18 Montreal Quebec 23.1°C
19 Brockville Ontario 23.1°C
20 Kingston Ontario 23.1°C
21 Ottawa Ontario 23.1°C
22 Greater Napanee Ontario 22.9°C
23 Picton Ontario 22.8°C
24 Sandbanks Ontario 22.8°C
25 Brighton Ontario 22.5°C
Show 25 more ▸
26 Cobourg Ontario 22.5°C
27 Niagara Falls Ontario 22.2°C
28 Port Darlington Ontario 22.2°C
29 Scarborough Bluffs Ontario 22.2°C
30 St. Catharines Ontario 22.2°C
31 Thorold Ontario 22.2°C
32 Oshawa Ontario 22.1°C
33 Niagara-on-the-Lake Ontario 22.0°C
34 Rouge Beach Ontario 22.0°C
35 Sarnia Ontario 22.0°C
36 Cherry Beach Ontario 22.0°C
37 Oakville Ontario 22.0°C
38 Toronto Islands Ontario 22.0°C
39 Toronto Ontario 22.0°C
40 Woodbine Beach Ontario 22.0°C
41 Brights Grove Ontario 21.9°C
42 Burlington Ontario 21.8°C
43 Grimsby Ontario 21.8°C
44 Hamilton Ontario 21.8°C
45 Highland Glen Ontario 21.8°C
46 Kennedy Acres Ontario 21.8°C
47 Kettle Point Ontario 21.8°C
48 Mississauga Ontario 21.8°C
49 Ipperwash Beach Ontario 21.8°C
50 Lambton Shores Ontario 21.8°C

Coldest 10 in Canada in August

Same data the other way. Helpful if you want to know which Canada coasts to avoid for swimming in August.

# 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

More on this region