17.12
wed
wed
Day
14°F
E 7 mph
Precip.
0%
0%
Night
28°F
NW 12 mph
Precip.
100%
100%
18.12
thu
thu
Day
23°F
S 18 mph
Precip.
100%
100%
Night
5°F
S 19 mph
Precip.
0%
0%
19.12
fri
fri
Day
3°F
S 7 mph
Precip.
0%
0%
Night
10°F
NW 9 mph
Precip.
88%
88%
20.12
sat
sat
Day
21°F
E 6 mph
Precip.
80%
80%
Night
7°F
E 16 mph
Precip.
0%
0%
21.12
sun
sun
Day
-4°F
SE 7 mph
Precip.
0%
0%
Night
5°F
E 6 mph
Precip.
0%
0%
22.12
mon
mon
Day
10°F
SW 2 mph
Precip.
100%
100%
Night
21°F
NE 2 mph
Precip.
0%
0%
23.12
tue
tue
Day
28°F
E 5 mph
Precip.
0%
0%
Night
19°F
SE 11 mph
Precip.
0%
0%
24.12
wed
wed
Day
12°F
N 3 mph
Precip.
74%
74%
Night
23°F
E 2 mph
Precip.
0%
0%
25.12
thu
thu
Day
21°F
SE 14 mph
Precip.
0%
0%
Night
10°F
E 6 mph
Precip.
0%
0%
26.12
fri
fri
Day
16°F
E 6 mph
Precip.
0%
0%
Night
16°F
SE 3 mph
Precip.
0%
0%
27.12
sat
sat
Day
18°F
SE 11 mph
Precip.
0%
0%
Night
0°F
S 6 mph
Precip.
0%
0%
28.12
sun
sun
Day
5°F
W 4 mph
Precip.
0%
0%
Night
23°F
NW 10 mph
Precip.
100%
100%
29.12
mon
mon
Day
30°F
E 6 mph
Precip.
100%
100%
Night
19°F
SE 8 mph
Precip.
0%
0%
30.12
tue
tue
Day
18°F
E 3 mph
Precip.
0%
0%
Night
18°F
E 4 mph
Precip.
0%
0%
sea water
temperature
temperature
| Thunder Bay |
monthly
weather
weather
| Thunder Bay |
current
weather
weather
| Thunder Bay |
7 days
forecast
forecast
| Thunder Bay |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 38.6°F. The highest and lowest sea temperatures during the month were 41.7°F and 36.9°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 35.1°F. The highest and lowest sea temperatures during the month were 36.3°F and 34.0°F.
Air temperature in Thunder Bay, °F
Precipitation total in Thunder Bay, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Thunder Bay
Thunder Bay on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Thunder Bay
Local time: 16:33
December 17, wednesday
1800
23°F
NW
3 mph
3 mph
2100
25°F
NW
3 mph
3 mph
December 18, thursday
0000
28°F
NW
12 mph
12 mph
0300
30°F
NW
11 mph
11 mph
0600
32°F
NW
9 mph
9 mph
0900
32°F
SW
8 mph
8 mph
1200
23°F
S
18 mph
18 mph
1500
14°F
S
21 mph
21 mph
