Average sea water temperature in December:
+40.3°F
| Minimum sea water temperature in December: | 45.5°F |
| Maximum sea water temperature in December: | 36.5°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 40.3°F. The highest and lowest sea temperatures during the month were 43.9°F and 37.8°F.
Monthly sea water temperature in Sydney, °F
Which Canada resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Tofino | 49.7°F | 48.7°F |
| Victoria | 48.7°F | 47.9°F |
| Surrey | 47.5°F | 46.3°F |
| Nanaimo | 47.3°F | 46.7°F |
| North Vancouver | 46.6°F | 46.3°F |
| Vancouver | 46.5°F | 46.3°F |
| Saint John | 45.6°F | 44.5°F |
| Saint Andrews | 44.0°F | 43.5°F |
| Montreal | 42.9°F | 40.0°F |
| Halifax | 42.7°F | 41.3°F |
| Lunenburg | 42.0°F | 41.3°F |
| Kingston | 41.0°F | 43.2°F |
| Barrie | 40.7°F | 40.7°F |
| Niagara-on-the-Lake | 40.6°F | 42.9°F |
| Sydney | 40.3°F | 40.4°F |
| Niagara Falls | 39.7°F | 42.2°F |
| Hamilton | 39.6°F | 42.2°F |
| Mississauga | 39.3°F | 41.9°F |
| Toronto | 39.3°F | 41.6°F |
| Corner Brook | 39.2°F | 36.3°F |
Best time for vacation in Sydney
Sydney on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Sydney
Local time: 04:47
December 21, sunday
0600
30°F
N
9 mph
9 mph
0900
34°F
N
14 mph
14 mph
1200
37°F
N
19 mph
19 mph
1500
39°F
N
19 mph
19 mph
1800
41°F
NE
17 mph
17 mph
2100
39°F
NE
14 mph
14 mph
December 22, monday
0000
36°F
E
12 mph
12 mph
0300
34°F
E
15 mph
15 mph
