Current Sea Water Temperature:
+66.4°F
| Maximum Sea Water Temperature in September: | 67.6°F |
| Minimum Sea Water Temperature in September: | 51.4°F |
| Average water temperature in September: | 61.5°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| September 08 | 66.4°F | September 03 | 65.4°F |
| September 07 | 67.2°F | September 02 | 64.8°F |
| September 06 | 66.6°F | September 01 | 63.6°F |
| September 05 | 65.8°F | August 31 | 63.6°F |
| September 04 | 66.2°F | August 30 | 63.4°F |
When is the Warmest Sea for Thunder Bay?
According to our data for the last three years for Thunder Bay the highest average sea water temperature was in August, September and July.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2026 for Thunder Bay was 62.5°F. The maximum and minimum values were 57.0°F and 65.2°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Thunder Bay was 61.0°F. The maximum and minimum values were 58.2°F and 63.6°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Thunder Bay was 52.0°F. The maximum and minimum values were 44.2°F and 61.2°F respectively.
Canada Resorts:
NAME
F°
| Halifax |  |
+62 |
| Montreal |  |
+72 |
| Niagara Falls |  |
+80 |
| Ottawa | |
+70 |
| Prince Edward Island | |
+54 |
| Quebec | |
+68 |
| Saint Andrews | |
+64 |
| Saint John | |
+66 |
| Sydney | |
+64 |
| Thunder Bay | |
+62 |
| Toronto | |
+78 |
| Vancouver | |
+60 |
| Victoria | |
+62 |
| Winnipeg |  |
+72 |
| Yellowknife | |
+60 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Thunder Bay
Local time: 16:19
08 sep, tuesday
| 1800 |  |
64°F | NE 14 mph |
| 2100 |  |
66°F | NE 14 mph |
09 sep, wednesday
| 0000 |  |
68°F | NE 15 mph |
| 0300 | |
70°F | NE 14 mph |
| 0600 | |
62°F | E 14 mph |
| 0900 |  |
60°F | E 14 mph |
| 1200 |  |
64°F | E 15 mph |
| 1500 | |
68°F | E 17 mph |