In September warmest sea in Canada is usually observed in the following locations: Windsor, Niagara-on-the-Lake, Kingston.
Table below shows the average sea water temperature for marine resorts of Canada in September for the last three years.
| Place name | September 2025 | September 2024 | September 2023 |
|---|---|---|---|
| Windsor | 68.5°F | 70.8°F | 69.0°F |
| Niagara-on-the-Lake | 67.8°F | 70.0°F | 69.4°F |
| Kingston | 67.2°F | 69.2°F | 69.9°F |
| Montreal | 66.7°F | 68.5°F | 69.7°F |
| Barrie | 66.4°F | 68.2°F | 67.7°F |
| Niagara Falls | 66.4°F | 68.2°F | 68.5°F |
| Hamilton | 66.3°F | 68.8°F | 67.4°F |
| Summerside | 66.2°F | 65.5°F | 65.8°F |
| Quebec | 65.9°F | 66.6°F | 67.8°F |
| Charlottetown | 65.8°F | 64.5°F | 64.7°F |
| Mississauga | 65.6°F | 68.1°F | 66.6°F |
| Lunenburg | 65.4°F | 60.5°F | 63.4°F |
| Oshawa | 65.2°F | 68.3°F | 67.5°F |
| Halifax | 65.2°F | 60.8°F | 62.7°F |
| Toronto | 65.1°F | 67.7°F | 67.1°F |
| Prince Edward Island | 65.0°F | 64.7°F | 63.8°F |
| Sydney | 64.8°F | 64.8°F | 62.1°F |
| Winnipeg | 64.2°F | 66.0°F | 64.2°F |
| Gimli | 63.6°F | 66.1°F | 64.1°F |
| Les Iles-de-la-Madeleine | 63.3°F | 62.0°F | 60.7°F |
| Surrey | 62.4°F | 60.6°F | 60.6°F |
| Moncton | 62.1°F | 60.5°F | 61.8°F |
| North Vancouver | 61.9°F | 59.7°F | 58.9°F |
| Nanaimo | 61.8°F | 61.2°F | 59.3°F |
| Vancouver | 61.7°F | 59.5°F | 58.8°F |
| Corner Brook | 61.5°F | 61.9°F | 61.6°F |
| Rocky Harbour | 60.8°F | 61.3°F | 61.4°F |
| Thunder Bay | 59.9°F | 63.7°F | 60.1°F |
| Saint John | 58.5°F | 58.6°F | 58.6°F |
| Tofino | 58.3°F | 56.9°F | 56.9°F |
| Saint Andrews | 58.2°F | 57.9°F | 58.6°F |
| Yellowknife | 57.4°F | 54.8°F | 54.7°F |
| Twillingate Island | 56.9°F | 59.2°F | 57.7°F |
| St. John's | 56.1°F | 59.6°F | 56.2°F |
| Bonavista | 55.7°F | 59.6°F | 55.6°F |
| Trinity | 55.5°F | 59.4°F | 54.6°F |
| Victoria | 53.0°F | 52.6°F | 52.5°F |
Charts below show average sea water temperature for Canada resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of Canada resorts at that time.
Places in Canada:
Name
°F
