Current Sea Water Temperature:
+49.8°F
| Maximum Sea Water Temperature in October: | 65.4°F |
| Minimum Sea Water Temperature in October: | 45.4°F |
| Average water temperature in October: | 53.9°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| October 19 | 49.8°F | October 14 | 52.6°F |
| October 18 | 51.6°F | October 13 | 52.8°F |
| October 17 | 51.6°F | October 12 | 53.0°F |
| October 16 | 52.0°F | October 11 | 52.4°F |
| October 15 | 52.4°F | October 10 | 52.0°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 2026 for Thunder Bay was 60.6°F. The maximum and minimum values were 50.8°F and 67.2°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 |  |
+32 |
| Moncton | |
+36 |
| Montreal | |
+44 |
| Nanaimo |  |
+48 |
| Niagara Falls | |
+50 |
| Ottawa | |
+40 |
| Prince Edward Island | |
+40 |
| Quebec | |
+38 |
| Saint Andrews | |
+46 |
| St. John's | |
+30 |
| Sydney | |
+32 |
| Toronto | |
+50 |
| Vancouver | |
+54 |
| Victoria | |
+50 |
| Winnipeg | |
+44 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Thunder Bay
Local time: 04:12
19 oct, monday
| 0600 |  |
46°F | SE 6 mph |
| 0900 | |
44°F | SE 5 mph |
| 1200 |  |
50°F | S 6 mph |
| 1500 | |
52°F | NW 5 mph |
| 1800 | |
50°F | NW 4 mph |
| 2100 |  |
46°F | W 2 mph |
20 oct, tuesday
| 0000 | |
46°F | W 3 mph |
| 0300 | |
44°F | W 5 mph |