In August warmest sea in Canada is usually observed in the following locations: Montreal, Windsor, Niagara-on-the-Lake.
Table below shows the average sea water temperature for marine resorts of Canada in August for the last three years.
| Place name | August 2026 | August 2025 | August 2024 |
|---|---|---|---|
| Montreal | 74.6°F | 74.7°F | 74.6°F |
| Windsor | 74.6°F | 74.3°F | 74.4°F |
| Niagara-on-the-Lake | 73.2°F | 74.7°F | 73.8°F |
| Kingston | 73.2°F | 73.2°F | 73.3°F |
| Quebec | 71.6°F | 73.1°F | 72.2°F |
| Niagara Falls | 71.5°F | 72.9°F | 71.7°F |
| Barrie | 71.2°F | 72.6°F | 72.0°F |
| Summerside | 71.0°F | 70.2°F | 70.6°F |
| Winnipeg | 71.0°F | 69.0°F | 72.0°F |
| Gimli | 70.5°F | 68.6°F | 71.6°F |
| Hamilton | 69.9°F | 73.8°F | 72.3°F |
| Charlottetown | 69.8°F | 68.9°F | 70.3°F |
| Toronto | 68.6°F | 73.2°F | 70.9°F |
| Prince Edward Island | 68.5°F | 67.9°F | 70.8°F |
| Mississauga | 68.5°F | 73.4°F | 71.1°F |
| Oshawa | 68.2°F | 73.1°F | 70.4°F |
| Sydney | 66.9°F | 67.5°F | 70.0°F |
| Surrey | 65.9°F | 65.2°F | 64.2°F |
| Halifax | 65.7°F | 63.9°F | 61.6°F |
| Lunenburg | 65.6°F | 64.0°F | 62.3°F |
| Les Iles-de-la-Madeleine | 65.6°F | 65.4°F | 68.3°F |
| Nanaimo | 64.4°F | 64.7°F | 63.8°F |
| North Vancouver | 64.0°F | 65.0°F | 64.2°F |
| Moncton | 63.9°F | 64.0°F | 65.2°F |
| Vancouver | 63.8°F | 64.9°F | 64.1°F |
| Corner Brook | 62.9°F | 64.6°F | 67.0°F |
| Rocky Harbour | 61.8°F | 63.1°F | 65.4°F |
| Thunder Bay | 61.2°F | 63.2°F | 66.4°F |
| Twillingate Island | 59.6°F | 60.1°F | 64.1°F |
| Saint Andrews | 59.3°F | 59.1°F | 59.3°F |
| Tofino | 58.5°F | 56.9°F | 58.3°F |
| Saint John | 58.4°F | 59.5°F | 59.3°F |
| Bonavista | 57.7°F | 58.6°F | 63.5°F |
| St. John's | 57.0°F | 57.9°F | 60.9°F |
| Trinity | 55.9°F | 56.5°F | 61.2°F |
| Yellowknife | 55.3°F | 59.6°F | 59.2°F |
| Victoria | 53.3°F | 53.1°F | 52.2°F |
Charts below show average sea water temperature for Canada resorts with the warmest sea in August.
You can also check other months of the year to see sea temperature of Canada resorts at that time.
Places in Canada:
Name
°F
