Average sea water temperature in September:
+67.3°F
| Minimum sea water temperature in September: | 74.3°F |
| Maximum sea water temperature in September: | 57.6°F |
Daily sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 67.2°F. The highest and lowest sea temperatures during the month were 70.3°F and 60.1°F.
Monthly sea water temperature in Oshawa, °F
Which Canada resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Windsor | 73.3°F | 68.5°F |
| Niagara-on-the-Lake | 72.2°F | 67.8°F |
| Kingston | 71.2°F | 67.2°F |
| Niagara Falls | 70.7°F | 66.4°F |
| Montreal | 70.0°F | 66.7°F |
| Barrie | 69.7°F | 66.4°F |
| Quebec | 69.2°F | 65.9°F |
| Gimli | 69.0°F | 63.6°F |
| Winnipeg | 68.6°F | 64.2°F |
| Hamilton | 68.1°F | 66.3°F |
| Toronto | 67.4°F | 65.1°F |
| Mississauga | 67.2°F | 65.6°F |
| Oshawa | 67.2°F | 65.2°F |
| Summerside | 65.5°F | 66.2°F |
| Sydney | 64.6°F | 64.8°F |
| Charlottetown | 64.4°F | 65.8°F |
| Thunder Bay | 63.5°F | 59.9°F |
| Halifax | 63.4°F | 65.2°F |
| Prince Edward Island | 63.2°F | 65.0°F |
| Lunenburg | 62.8°F | 65.4°F |
Best time for vacation in Oshawa
Oshawa on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Oshawa
Local time: 14:00
September 15, tuesday
1500
70°F
N
14 mph
14 mph
1800
68°F
N
7 mph
7 mph
2100
68°F
NE
8 mph
8 mph
September 16, wednesday
0000
68°F
NE
6 mph
6 mph
0300
66°F
NE
4 mph
4 mph
0600
64°F
SE
5 mph
5 mph
0900
68°F
SE
11 mph
11 mph
1200
72°F
SE
9 mph
9 mph
