15.09
tue
tue
Day
63°F
S 4 mph
Precip.
2%
2%
Night
50°F
SW 1 mph
Precip.
18%
18%
16.09
wed
wed
Day
61°F
NE 10 mph
Precip.
14%
14%
Night
54°F
E 4 mph
Precip.
24%
24%
17.09
thu
thu
Day
66°F
W 3 mph
Precip.
14%
14%
Night
55°F
NE 2 mph
Precip.
15%
15%
18.09
fri
fri
Day
66°F
SE 16 mph
Precip.
4%
4%
Night
48°F
SE 13 mph
Precip.
4%
4%
19.09
sat
sat
Day
54°F
SE 10 mph
Precip.
2%
2%
Night
43°F
S 5 mph
Precip.
4%
4%
20.09
sun
sun
Day
57°F
NE 11 mph
Precip.
17%
17%
Night
50°F
NE 6 mph
Precip.
21%
21%
21.09
mon
mon
Day
61°F
NE 2 mph
Precip.
13%
13%
Night
46°F
S 4 mph
Precip.
9%
9%
22.09
tue
tue
Day
59°F
S 9 mph
Precip.
3%
3%
Night
46°F
SW 4 mph
Precip.
25%
25%
23.09
wed
wed
Day
55°F
SW 8 mph
Precip.
12%
12%
Night
41°F
W 4 mph
Precip.
11%
11%
24.09
thu
thu
Day
54°F
N 8 mph
Precip.
14%
14%
Night
52°F
N 11 mph
Precip.
28%
28%
25.09
fri
fri
Day
59°F
N 12 mph
Precip.
24%
24%
Night
59°F
NE 16 mph
Precip.
32%
32%
26.09
sat
sat
Day
66°F
N 16 mph
Precip.
25%
25%
Night
64°F
N 24 mph
Precip.
79%
79%
27.09
sun
sun
Day
59°F
NE 8 mph
Precip.
49%
49%
Night
61°F
S 3 mph
Precip.
81%
81%
28.09
mon
mon
Day
57°F
SE 7 mph
Precip.
74%
74%
Night
55°F
S 14 mph
Precip.
38%
38%
sea water
temperature
temperature
| Saint John |
monthly
weather
weather
| Saint John |
current
weather
weather
| Saint John |
7 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 57.6°F. The highest and lowest sea temperatures during the month were 59.0°F and 56.1°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: 21:51
September 16, wednesday
0000
50°F
SW
1 mph
1 mph
0300
48°F
SW
1 mph
1 mph
0600
48°F
E
2 mph
2 mph
0900
54°F
N
4 mph
4 mph
1200
61°F
NE
10 mph
10 mph
1500
63°F
NE
12 mph
12 mph
1800
59°F
NE
11 mph
11 mph
2100
54°F
NE
6 mph
6 mph
