30.12
tue
tue
Day
27°F
E 16 mph
Precip.
0%
0%
Night
12°F
E 15 mph
Precip.
0%
0%
31.12
wed
wed
Day
23°F
E 14 mph
Precip.
0%
0%
Night
27°F
SW 4 mph
Precip.
100%
100%
01.01
thu
thu
Day
28°F
SE 4 mph
Precip.
0%
0%
Night
10°F
SE 11 mph
Precip.
0%
0%
02.01
fri
fri
Day
10°F
E 11 mph
Precip.
0%
0%
Night
9°F
E 6 mph
Precip.
0%
0%
03.01
sat
sat
Day
19°F
NW 2 mph
Precip.
29%
29%
Night
9°F
S 4 mph
Precip.
0%
0%
04.01
sun
sun
Day
12°F
SE 6 mph
Precip.
21%
21%
Night
3°F
SE 7 mph
Precip.
0%
0%
05.01
mon
mon
Day
5°F
SE 5 mph
Precip.
0%
0%
Night
9°F
SW 4 mph
Precip.
100%
100%
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 December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 44.9°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: 00:41
December 30, tuesday
0300
41°F
NE
17 mph
17 mph
0600
32°F
E
15 mph
15 mph
0900
30°F
E
15 mph
15 mph
1200
27°F
E
16 mph
16 mph
1500
21°F
E
17 mph
17 mph
1800
18°F
E
16 mph
16 mph
2100
14°F
E
16 mph
16 mph
December 31, wednesday
0000
12°F
E
15 mph
15 mph
