Average sea water temperature in September:
+58.4°F
| Minimum sea water temperature in September: | 62.6°F |
| Maximum sea water temperature in September: | 55.0°F |
Daily sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 58.5°F. The highest and lowest sea temperatures during the month were 61.2°F and 56.7°F.
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Monthly sea water temperature in Saint John, °F
Which Canada resorts have warmest sea in September?
| Place name | September 2025 | September 2024 |
|---|---|---|
| Windsor | 68.5°F | 70.8°F |
| Niagara-on-the-Lake | 67.8°F | 70.0°F |
| Kingston | 67.2°F | 69.2°F |
| Montreal | 66.7°F | 68.5°F |
| Barrie | 66.4°F | 68.2°F |
| Niagara Falls | 66.4°F | 68.2°F |
| Hamilton | 66.3°F | 68.8°F |
| Summerside | 66.2°F | 65.5°F |
| Quebec | 65.9°F | 66.6°F |
| Charlottetown | 65.8°F | 64.5°F |
| Mississauga | 65.6°F | 68.1°F |
| Lunenburg | 65.4°F | 60.5°F |
| Halifax | 65.2°F | 60.8°F |
| Oshawa | 65.2°F | 68.3°F |
| Toronto | 65.1°F | 67.7°F |
| Prince Edward Island | 65.0°F | 64.7°F |
| Sydney | 64.8°F | 64.8°F |
| Winnipeg | 64.2°F | 66.0°F |
| Gimli | 63.6°F | 66.1°F |
| Les Iles-de-la-Madeleine | 63.3°F | 62.0°F |
Best time for vacation in Saint John
Saint John on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Saint John
Local time: 08:47
December 29, monday
0900
27°F
NW
3 mph
3 mph
1200
32°F
NW
9 mph
9 mph
1500
36°F
W
16 mph
16 mph
1800
37°F
NW
16 mph
16 mph
2100
39°F
NW
17 mph
17 mph
December 30, tuesday
0000
41°F
N
14 mph
14 mph
0300
41°F
NE
17 mph
17 mph
0600
37°F
NE
20 mph
20 mph
