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Warmest sea in Canada in October

829 coastal locations in Canada ranked by their typical October sea temperature. Region-wide average in October: 10.0°C. The top of the list is where to find the warmest swimming this month.

Warmest in October

Chatham-Kent

17.3°C October mean in Canada

Regional October average

10.0°C

across all 829 coastal locations in Canada

Vs annual mean

+3.0°C

above the year-round regional average

What the Canada sea feels like in October

This water is very cold and can cause pain. We don't recommend you swim in this temperature for anything other than very short swims of 5 to 10 minutes unless you are a very experienced cold water swimmer.

Canada monthly average 1.8°C to 14.4°C
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  • 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 October fits in the year

October 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 October 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 October

Sorted by the typical October 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 October mean
1 Chatham-Kent Ontario 17.3°C
2 Mitchell's Bay Ontario 17.2°C
3 Port Stanley Ontario 17.1°C
4 Port Burwell Ontario 17.1°C
5 Fort Erie Ontario 16.9°C
6 Long Point Ontario 16.9°C
7 Port Rowan Ontario 16.9°C
8 Turkey Point Ontario 16.9°C
9 Crystal Beach Ontario 16.9°C
10 Port Colborne Ontario 16.8°C
11 Pelee Island Ontario 16.7°C
12 Point Pelee Ontario 16.7°C
13 Port Dover Ontario 16.6°C
14 Colchester Ontario 16.3°C
15 Montreal Quebec 16.1°C
16 Kingston Ontario 16.0°C
17 Brockville Ontario 16.0°C
18 Ottawa Ontario 16.0°C
19 Greater Napanee Ontario 15.8°C
20 Picton Ontario 15.6°C
21 Sandbanks Ontario 15.6°C
22 Cobb Seamount British Columbia 15.5°C
23 Ipperwash Beach Ontario 15.4°C
24 Lambton Shores Ontario 15.4°C
25 Pinery Ontario 15.4°C
Show 25 more ▸
26 Brighton Ontario 15.4°C
27 Cobourg Ontario 15.4°C
28 Goderich Ontario 15.4°C
29 Grand Bend Ontario 15.4°C
30 Highland Glen Ontario 15.4°C
31 Kennedy Acres Ontario 15.4°C
32 Kettle Point Ontario 15.4°C
33 Brights Grove Ontario 15.2°C
34 Port Darlington Ontario 15.2°C
35 Niagara Falls Ontario 15.2°C
36 Scarborough Bluffs Ontario 15.2°C
37 St. Catharines Ontario 15.2°C
38 Thorold Ontario 15.2°C
39 Sarnia Ontario 15.2°C
40 Oshawa Ontario 15.0°C
41 Cherry Beach Ontario 15.0°C
42 Oakville Ontario 15.0°C
43 Toronto Islands Ontario 15.0°C
44 Toronto Ontario 15.0°C
45 Woodbine Beach Ontario 15.0°C
46 Niagara-on-the-Lake Ontario 14.9°C
47 Rouge Beach Ontario 14.9°C
48 Burlington Ontario 14.9°C
49 Grimsby Ontario 14.9°C
50 Hamilton Ontario 14.9°C

Coldest 10 in Canada in October

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

# Location October mean
1 Wrangel Bay Nunavut -1.6°C
2 Cameron Island Nunavut -1.6°C
3 Cape Sheridan Nunavut -1.6°C
4 Alert Nunavut -1.6°C
5 Discovery Harbour Nunavut -1.6°C
6 Iceberg Point Nunavut -1.5°C
7 Isachsen Nunavut -1.5°C
8 Pim Island Nunavut -1.5°C
9 Greely Fiord Nunavut -1.5°C
10 Airstrip Point Nunavut -1.5°C

More on this region