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 |
| Oshawa | 65.2°F | 68.3°F |
| Halifax | 65.2°F | 60.8°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: 17:10
January 15, thursday
1800
41°F
N
11 mph
11 mph
2100
41°F
N
12 mph
12 mph
January 16, friday
0000
39°F
N
12 mph
12 mph
0300
36°F
NE
14 mph
14 mph
0600
32°F
NE
14 mph
14 mph
0900
28°F
NE
21 mph
21 mph
1200
25°F
E
19 mph
19 mph
1500
27°F
E
19 mph
19 mph
