Average sea water temperature in September:
+57.0°F
| Minimum sea water temperature in September: | 64.0°F |
| Maximum sea water temperature in September: | 51.8°F |
Daily sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 56.7°F. The highest and lowest sea temperatures during the month were 60.8°F and 53.1°F.
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| St. John's |
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Monthly sea water temperature in St. John's, °F
Which Canada resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Niagara-on-the-Lake | 69.9°F | 67.8°F |
| Windsor | 69.8°F | 68.5°F |
| Kingston | 69.2°F | 67.2°F |
| Niagara Falls | 68.7°F | 66.4°F |
| Barrie | 67.9°F | 66.4°F |
| Quebec | 67.2°F | 65.9°F |
| Hamilton | 67.2°F | 66.3°F |
| Montreal | 66.9°F | 66.7°F |
| Toronto | 66.5°F | 65.1°F |
| Oshawa | 66.5°F | 65.2°F |
| Mississauga | 66.4°F | 65.6°F |
| Gimli | 64.6°F | 63.6°F |
| Winnipeg | 64.1°F | 64.2°F |
| Summerside | 63.1°F | 66.2°F |
| Charlottetown | 62.2°F | 65.8°F |
| Halifax | 61.7°F | 65.2°F |
| Sydney | 61.7°F | 64.8°F |
| Lunenburg | 61.6°F | 65.4°F |
| Prince Edward Island | 61.2°F | 65.0°F |
| Surrey | 60.6°F | 62.4°F |
Best time for vacation in St. John's
St. John's on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
St. John's
Local time: 22:21
November 15, sunday
0000
39°F
SE
9 mph
9 mph
0300
39°F
SE
9 mph
9 mph
0600
39°F
SE
11 mph
11 mph
0900
39°F
SE
12 mph
12 mph
1200
39°F
E
14 mph
14 mph
1500
39°F
E
15 mph
15 mph
1800
39°F
E
14 mph
14 mph
2100
37°F
E
16 mph
16 mph
