27.04
mon
mon
Day
46°F
W 11 mph
Precip.
0%
0%
Night
37°F
S 7 mph
Precip.
54%
54%
28.04
tue
tue
Day
41°F
SE 19 mph
Precip.
0%
0%
Night
32°F
SE 5 mph
Precip.
0%
0%
29.04
wed
wed
Day
41°F
SE 7 mph
Precip.
78%
78%
Night
32°F
S 5 mph
Precip.
0%
0%
30.04
thu
thu
Day
43°F
W 2 mph
Precip.
71%
71%
Night
30°F
SE 0 mph
Precip.
0%
0%
01.05
fri
fri
Day
43°F
N 2 mph
Precip.
0%
0%
Night
32°F
E 3 mph
Precip.
0%
0%
02.05
sat
sat
Day
46°F
NW 4 mph
Precip.
0%
0%
Night
36°F
N 1 mph
Precip.
0%
0%
03.05
sun
sun
Day
52°F
N 2 mph
Precip.
0%
0%
Night
43°F
S 6 mph
Precip.
0%
0%
sea water
temperature
temperature
| Thunder Bay |
monthly
weather
weather
| Thunder Bay |
current
weather
weather
| Thunder Bay |
14 days
forecast
forecast
| Thunder Bay |
Sea water temperature in April, °F
Show year:
2026
2025
2024
The average sea water temperature in April of 2026 was 33.4°F. The highest and lowest sea temperatures during the month were 34.9°F and 32.7°F.
Sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 41.0°F. The highest and lowest sea temperatures during the month were 49.6°F and 36.1°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: 11:29
April 27, monday
1200
46°F
W
11 mph
11 mph
1500
46°F
W
12 mph
12 mph
1800
41°F
W
12 mph
12 mph
2100
39°F
W
10 mph
10 mph
April 28, tuesday
0000
37°F
S
7 mph
7 mph
0300
39°F
S
11 mph
11 mph
0600
41°F
SE
19 mph
19 mph
0900
39°F
SE
21 mph
21 mph
