Average sea water temperature in December:
+38.4°F
| Minimum sea water temperature in December: | 43.0°F |
| Maximum sea water temperature in December: | 33.4°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 37.1°F. The highest and lowest sea temperatures during the month were 41.7°F and 33.4°F.
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| Thunder Bay |
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Monthly sea water temperature in Thunder Bay, °F
Which Canada resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Tofino | 49.4°F | 48.7°F |
| Victoria | 48.6°F | 47.9°F |
| Surrey | 47.3°F | 46.3°F |
| Nanaimo | 47.0°F | 46.7°F |
| North Vancouver | 46.3°F | 46.3°F |
| Vancouver | 46.3°F | 46.3°F |
| Saint John | 44.7°F | 44.5°F |
| Saint Andrews | 43.0°F | 43.5°F |
| Halifax | 41.7°F | 41.3°F |
| Montreal | 41.4°F | 40.0°F |
| Lunenburg | 40.8°F | 41.3°F |
| Kingston | 40.0°F | 43.2°F |
| Niagara-on-the-Lake | 39.9°F | 42.9°F |
| Hamilton | 39.3°F | 42.2°F |
| Sydney | 39.2°F | 40.4°F |
| Mississauga | 39.2°F | 41.9°F |
| Toronto | 39.1°F | 41.6°F |
| Barrie | 39.0°F | 40.7°F |
| Oshawa | 38.4°F | 39.7°F |
| Corner Brook | 38.1°F | 36.3°F |
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: 07:54
March 17, tuesday
0900
-11°F
SE
7 mph
7 mph
1200
5°F
SE
7 mph
7 mph
1500
14°F
SE
5 mph
5 mph
1800
16°F
NE
5 mph
5 mph
2100
12°F
N
6 mph
6 mph
March 18, wednesday
0000
14°F
N
3 mph
3 mph
0300
14°F
NW
2 mph
2 mph
0600
16°F
NW
6 mph
6 mph
