Average sea water temperature in December:
+38.4°F
| Minimum sea water temperature in December: | 43.0°F |
| Maximum sea water temperature in December: | 34.3°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 37.4°F. The highest and lowest sea temperatures during the month were 41.7°F and 34.3°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 | 49.5°F | 48.7°F |
| Victoria | 48.7°F | 47.9°F |
| Surrey | 47.4°F | 46.3°F |
| Nanaimo | 47.2°F | 46.7°F |
| North Vancouver | 46.5°F | 46.3°F |
| Vancouver | 46.4°F | 46.3°F |
| Saint John | 45.0°F | 44.5°F |
| Saint Andrews | 43.3°F | 43.5°F |
| Halifax | 42.1°F | 41.3°F |
| Montreal | 41.8°F | 40.0°F |
| Lunenburg | 41.2°F | 41.3°F |
| Kingston | 40.3°F | 43.2°F |
| Niagara-on-the-Lake | 40.0°F | 42.9°F |
| Sydney | 39.6°F | 40.4°F |
| Barrie | 39.5°F | 40.7°F |
| Hamilton | 39.3°F | 42.2°F |
| Mississauga | 39.2°F | 41.9°F |
| Toronto | 39.2°F | 41.6°F |
| Corner Brook | 38.5°F | 36.3°F |
| Oshawa | 38.4°F | 39.7°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: 17:38
December 28, sunday
1800
21°F
S
12 mph
12 mph
2100
16°F
S
17 mph
17 mph
December 29, monday
0000
14°F
S
21 mph
21 mph
0300
10°F
S
24 mph
24 mph
0600
5°F
S
24 mph
24 mph
0900
3°F
S
23 mph
23 mph
1200
7°F
S
21 mph
21 mph
1500
10°F
S
19 mph
19 mph
