06.04
mon
mon
Day
21°F
S 14 mph
Precip.
0%
0%
Night
14°F
E 5 mph
Precip.
0%
0%
07.04
tue
tue
Day
30°F
E 8 mph
Precip.
0%
0%
Night
21°F
NW 2 mph
Precip.
0%
0%
08.04
wed
wed
Day
30°F
NW 11 mph
Precip.
100%
100%
Night
30°F
E 6 mph
Precip.
0%
0%
09.04
thu
thu
Day
39°F
E 12 mph
Precip.
0%
0%
Night
28°F
E 4 mph
Precip.
0%
0%
10.04
fri
fri
Day
32°F
SE 7 mph
Precip.
82%
82%
Night
25°F
E 2 mph
Precip.
0%
0%
11.04
sat
sat
Day
37°F
N 6 mph
Precip.
0%
0%
Night
34°F
NW 6 mph
Precip.
100%
100%
12.04
sun
sun
Day
37°F
SW 2 mph
Precip.
0%
0%
Night
34°F
SW 3 mph
Precip.
74%
74%
13.04
mon
mon
Day
39°F
S 7 mph
Precip.
100%
100%
Night
34°F
S 11 mph
Precip.
0%
0%
14.04
tue
tue
Day
32°F
W 9 mph
Precip.
0%
0%
Night
27°F
SW 4 mph
Precip.
0%
0%
15.04
wed
wed
Day
36°F
W 11 mph
Precip.
0%
0%
Night
30°F
W 4 mph
Precip.
0%
0%
16.04
thu
thu
Day
34°F
NW 4 mph
Precip.
100%
100%
Night
32°F
SW 4 mph
Precip.
0%
0%
17.04
fri
fri
Day
39°F
N 5 mph
Precip.
100%
100%
Night
37°F
S 6 mph
Precip.
100%
100%
18.04
sat
sat
Day
41°F
SE 6 mph
Precip.
21%
21%
Night
36°F
SE 9 mph
Precip.
29%
29%
19.04
sun
sun
Day
37°F
SE 11 mph
Precip.
0%
0%
Night
36°F
NE 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 April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 34.4°F. The highest and lowest sea temperatures during the month were 38.5°F and 32.7°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: 19:26
April 06, monday
2100
18°F
SE
6 mph
6 mph
April 07, tuesday
0000
14°F
E
5 mph
5 mph
0300
12°F
E
5 mph
5 mph
0600
9°F
E
5 mph
5 mph
0900
14°F
E
6 mph
6 mph
1200
30°F
E
8 mph
8 mph
1500
36°F
NE
8 mph
8 mph
1800
36°F
NE
9 mph
9 mph
