Swimming in Saint John in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Saint John in september 2025.
In september, according to seasonal norms, the sea temperature in Saint John is:
Minimum: 54°F
Average: 56°F
Maximum: 58°F
Other useful seasonal weather averages in september:
- Outside temperature: 57°F to 65°F
- Most common weather: "Clear/Sunny"
- The wind blows at 8.1mph
- It rains a total of 2.9in, over 4 day(s).
Should we swim in Saint John in september?
No... The water temperature in Saint John in september is freezing
You won't be able to swim in Saint John in september! The water temperature is freezing, reaching as low as 54°F (and only 58°F at best)! Our advice: if you are going to Saint John this month, plan to sightsee and forget the beach!
Note also that in september, the climate is good with an average outside temperature of 61°F, 2.8in of precipitation (over 4 days) and 85.66 % humidity.
Water and normal seasonal temperatures in Saint John in september
| September | |||
| Average sea temperature | 56°F | ||
| Minimum sea temperature | 54°F | ||
| Maximum sea temperature | 58°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 58°F | ||
| Wind speed | 11.8mph | ||
| Wind temperature | 56°F | ||
| Precipitation | 2.9in | ||
| Number of days of rain | 4 jour(s) (13%) | ||
| Humidity | 86% | ||
| Visibility in kilometers | 9.09km | ||
| Cloud cover | 39% | ||
| Our opinion | freezing swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Saint John
Swim elsewhere in Canada in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Halifax in september | 62°F | 67°F | cold swimming | Quebec City in september | 55°F | 58°F | freezing swimming | Vancouver in september | 53°F | 54°F | freezing swimming | St. John's (Newfoundland and Labrador) in september | 54°F | 60°F | freezing swimming | Tofino in september | 56°F | 60°F | freezing swimming | Victoria in september | 53°F | 55°F | freezing swimming | Bathurst in september | 54°F | 58°F | freezing swimming | Charlottetown in september | 61°F | 66°F | cold swimming | Nanaimo in september | 53°F | 55°F | freezing swimming |