29.12
mon
mon
Day
34°F
NW 10 mph
Precip.
0%
0%
Night
41°F
NW 11 mph
Precip.
100%
100%
30.12
tue
tue
Day
32°F
NE 14 mph
Precip.
0%
0%
Night
16°F
E 14 mph
Precip.
0%
0%
31.12
wed
wed
Day
18°F
E 13 mph
Precip.
0%
0%
Night
28°F
N 11 mph
Precip.
100%
100%
01.01
thu
thu
Day
23°F
E 11 mph
Precip.
0%
0%
Night
9°F
E 5 mph
Precip.
0%
0%
02.01
fri
fri
Day
19°F
W 7 mph
Precip.
100%
100%
Night
14°F
S 6 mph
Precip.
0%
0%
03.01
sat
sat
Day
21°F
E 2 mph
Precip.
0%
0%
Night
16°F
E 6 mph
Precip.
0%
0%
04.01
sun
sun
Day
12°F
SE 11 mph
Precip.
0%
0%
Night
3°F
SE 11 mph
Precip.
0%
0%
05.01
mon
mon
Day
14°F
E 8 mph
Precip.
0%
0%
Night
10°F
NE 2 mph
Precip.
0%
0%
06.01
tue
tue
Day
34°F
N 9 mph
Precip.
100%
100%
Night
41°F
NW 16 mph
Precip.
100%
100%
07.01
wed
wed
Day
36°F
E 11 mph
Precip.
0%
0%
Night
28°F
E 9 mph
Precip.
0%
0%
08.01
thu
thu
Day
30°F
SE 7 mph
Precip.
0%
0%
Night
27°F
SE 9 mph
Precip.
0%
0%
09.01
fri
fri
Day
27°F
SE 12 mph
Precip.
0%
0%
Night
19°F
SE 6 mph
Precip.
0%
0%
10.01
sat
sat
Day
27°F
SW 4 mph
Precip.
0%
0%
Night
30°F
NW 13 mph
Precip.
100%
100%
11.01
sun
sun
Day
39°F
NW 23 mph
Precip.
100%
100%
Night
39°F
N 17 mph
Precip.
100%
100%
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 December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 45.0°F. The highest and lowest sea temperatures during the month were 47.7°F and 42.3°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 39.8°F. The highest and lowest sea temperatures during the month were 41.9°F and 38.3°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: 02:42
December 29, monday
0300
19°F
NE
2 mph
2 mph
0600
18°F
E
2 mph
2 mph
0900
27°F
NW
4 mph
4 mph
1200
34°F
NW
10 mph
10 mph
1500
36°F
NW
15 mph
15 mph
1800
37°F
NW
17 mph
17 mph
2100
39°F
NW
21 mph
21 mph
December 30, tuesday
0000
41°F
NW
11 mph
11 mph
