Current Sea Water Temperature:
+62.0°F
| Maximum Sea Water Temperature in August: | 71.8°F |
| Minimum Sea Water Temperature in August: | 56.8°F |
| Average water temperature in August: | 64.6°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| August 19 | 62.0°F | August 14 | 63.8°F |
| August 18 | 63.8°F | August 13 | 64.4°F |
| August 17 | 64.6°F | August 12 | 64.0°F |
| August 16 | 64.0°F | August 11 | 62.2°F |
| August 15 | 64.0°F | August 10 | 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 |  |
+70 |
| Montreal |  |
+70 |
| Niagara Falls | |
+70 |
| Ottawa |  |
+66 |
| Prince Edward Island | |
+70 |
| Quebec | |
+66 |
| Saint Andrews | |
+60 |
| Saint John | |
+74 |
| Sydney | |
+68 |
| Thunder Bay |  |
+58 |
| Toronto | |
+66 |
| Vancouver | |
+60 |
| Victoria | |
+54 |
| Winnipeg | |
+60 |
| Yellowknife | |
+56 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Thunder Bay
Local time: 09:26
19 aug, wednesday
| 1200 |  |
70°F | NE 2 mph |
| 1500 |  |
76°F | N 9 mph |
| 1800 |  |
62°F | N 7 mph |
| 2100 | |
62°F | N 5 mph |
20 aug, thursday
| 0000 |  |
58°F | SW 8 mph |
| 0300 | |
56°F | SW 2 mph |
| 0600 | |
54°F | S 5 mph |
| 0900 |  |
54°F | S 6 mph |