22.09
tue
tue
Day
54°F
S 7 mph
Precip.
12%
12%
Night
45°F
SW 5 mph
Precip.
28%
28%
23.09
wed
wed
Day
57°F
SW 6 mph
Precip.
3%
3%
Night
45°F
SW 3 mph
Precip.
10%
10%
24.09
thu
thu
Day
61°F
W 4 mph
Precip.
2%
2%
Night
50°F
SW 5 mph
Precip.
24%
24%
25.09
fri
fri
Day
61°F
W 12 mph
Precip.
14%
14%
Night
57°F
SW 11 mph
Precip.
17%
17%
26.09
sat
sat
Day
63°F
SW 9 mph
Precip.
13%
13%
Night
57°F
SW 11 mph
Precip.
15%
15%
27.09
sun
sun
Day
57°F
SW 15 mph
Precip.
15%
15%
Night
48°F
SW 9 mph
Precip.
27%
27%
28.09
mon
mon
Day
57°F
W 11 mph
Precip.
4%
4%
Night
46°F
SW 4 mph
Precip.
14%
14%
sea water
temperature
temperature
| Saint John |
monthly
weather
weather
| Saint John |
current
weather
weather
| Saint John |
14 days
forecast
forecast
| Saint John |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 57.4°F. The highest and lowest sea temperatures during the month were 59.0°F and 55.9°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 54.9°F. The highest and lowest sea temperatures during the month were 57.9°F and 52.5°F.
Air temperature in Saint John, °F
Precipitation total in Saint John, in.
* Charts above show average data for the last 3 years.
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: 09:44
September 22, tuesday
1200
54°F
S
7 mph
7 mph
1500
59°F
SW
5 mph
5 mph
1800
55°F
NW
6 mph
6 mph
2100
48°F
W
7 mph
7 mph
September 23, wednesday
0000
45°F
SW
5 mph
5 mph
0300
41°F
S
6 mph
6 mph
0600
39°F
S
6 mph
6 mph
0900
46°F
S
7 mph
7 mph
