20.12
sat
sat
Day
28°F
E 17 mph
Precip.
0%
0%
Night
30°F
NE 6 mph
Precip.
0%
0%
21.12
sun
sun
Day
41°F
NE 16 mph
Precip.
0%
0%
Night
30°F
E 16 mph
Precip.
0%
0%
22.12
mon
mon
Day
23°F
SE 16 mph
Precip.
0%
0%
Night
19°F
SE 11 mph
Precip.
0%
0%
23.12
tue
tue
Day
25°F
NE 9 mph
Precip.
0%
0%
Night
30°F
NW 12 mph
Precip.
100%
100%
24.12
wed
wed
Day
28°F
S 14 mph
Precip.
0%
0%
Night
23°F
SE 6 mph
Precip.
0%
0%
25.12
thu
thu
Day
34°F
NE 12 mph
Precip.
21%
21%
Night
25°F
S 3 mph
Precip.
0%
0%
26.12
fri
fri
Day
32°F
W 17 mph
Precip.
100%
100%
Night
32°F
SE 14 mph
Precip.
100%
100%
27.12
sat
sat
Day
27°F
SE 11 mph
Precip.
0%
0%
Night
19°F
SE 11 mph
Precip.
0%
0%
28.12
sun
sun
Day
19°F
SE 13 mph
Precip.
0%
0%
Night
16°F
SE 9 mph
Precip.
0%
0%
29.12
mon
mon
Day
21°F
SE 7 mph
Precip.
0%
0%
Night
14°F
S 4 mph
Precip.
0%
0%
30.12
tue
tue
Day
19°F
S 9 mph
Precip.
0%
0%
Night
16°F
S 7 mph
Precip.
0%
0%
31.12
wed
wed
Day
23°F
S 6 mph
Precip.
0%
0%
Night
18°F
SE 2 mph
Precip.
0%
0%
01.01
thu
thu
Day
27°F
S 11 mph
Precip.
0%
0%
Night
19°F
S 4 mph
Precip.
0%
0%
02.01
fri
fri
Day
28°F
SE 4 mph
Precip.
0%
0%
Night
25°F
E 6 mph
Precip.
0%
0%
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 45.7°F. The highest and lowest sea temperatures during the month were 47.7°F and 43.5°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: 06:53
December 20, saturday
0900
28°F
E
21 mph
21 mph
1200
28°F
E
17 mph
17 mph
1500
32°F
E
14 mph
14 mph
1800
30°F
E
10 mph
10 mph
2100
27°F
E
4 mph
4 mph
December 21, sunday
0000
30°F
NE
6 mph
6 mph
0300
36°F
N
17 mph
17 mph
0600
37°F
NE
22 mph
22 mph
