Current sea water temperature:
+60.6°F
| Minimum sea water temperature in September: | 65.8°F |
| Maximum sea water temperature in September: | 51.3°F |
| Average sea water temperature in September: | 60.4°F |
| more information | |
14 days
forecast
forecast
| Thunder Bay |
monthly
weather
weather
| Thunder Bay |
Sea water temperature for the last 10 days:
| September 15 | 60.6°F | September 10 | 64.2°F |
| September 14 | 61.9°F | September 9 | 65.3°F |
| September 13 | 61.7°F | September 8 | 64.8°F |
| September 12 | 62.2°F | September 7 | 65.5°F |
| September 11 | 62.4°F | September 6 | 64.9°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:
2026
2025
2024
The average sea water temperature in August of 2026 was 61.2°F. The highest and lowest sea temperatures during the month were 63.7°F and 56.3°F.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 63.5°F. The highest and lowest sea temperatures during the month were 65.5°F and 60.6°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 51.8°F. The highest and lowest sea temperatures during the month were 60.1°F and 44.8°F.
current
weather
weather
| Thunder Bay |
weather in
September
September
| 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: 13:51
September 15, tuesday
1500
57°F
E
17 mph
17 mph
1800
63°F
E
17 mph
17 mph
2100
59°F
E
7 mph
7 mph
September 16, wednesday
0000
54°F
E
9 mph
9 mph
0300
50°F
SE
11 mph
11 mph
0600
46°F
SE
8 mph
8 mph
0900
45°F
SE
8 mph
8 mph
1200
52°F
SW
1 mph
1 mph
