Current sea water temperature:
+46.9°F
| Minimum sea water temperature in June: | 63.7°F |
| Maximum sea water temperature in June: | 37.4°F |
| Average sea water temperature in June: | 47.5°F |
| more information | |
14 days
forecast
forecast
| Thunder Bay |
monthly
weather
weather
| Thunder Bay |
Sea water temperature for the last 10 days:
| June 26 | 46.9°F | June 21 | 50.7°F |
| June 25 | 45.9°F | June 20 | 46.0°F |
| June 24 | 47.1°F | June 19 | 45.3°F |
| June 23 | 48.0°F | June 18 | 45.9°F |
| June 22 | 50.5°F | June 17 | 48.6°F |
Monthly sea water temperature, °F
When is the warmest sea in Thunder Bay?
Based on the data about daily sea water temperature for the last three years the warmest sea in Thunder Bay was noticed in August, September and July.
Monthly Sea Temperatures in Thunder Bay, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.2°F. The highest and lowest sea temperatures during the month were 68.0°F and 59.9°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 59.9°F. The highest and lowest sea temperatures during the month were 62.2°F and 57.4°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 61.1°F. The highest and lowest sea temperatures during the month were 64.9°F and 55.2°F.
current
weather
weather
| Thunder Bay |
weather in
July
July
| Thunder Bay |
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: 01:05
June 27, saturday
0300
55°F
W
4 mph
4 mph
0600
54°F
SW
3 mph
3 mph
0900
64°F
W
3 mph
3 mph
1200
66°F
NW
6 mph
6 mph
1500
64°F
NW
6 mph
6 mph
1800
61°F
W
6 mph
6 mph
2100
54°F
W
3 mph
3 mph
June 28, sunday
0000
50°F
W
2 mph
2 mph
