Average sea water temperature in December:
+70.5°F
| Minimum sea water temperature in December: | 75.4°F |
| Maximum sea water temperature in December: | 66.6°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 71.4°F. The highest and lowest sea temperatures during the month were 73.8°F and 69.1°F.
Monthly sea water temperature in Sydney, °F
Which Australia resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Darwin | 87.4°F | 88.2°F |
| Cairns | 84.0°F | 84.4°F |
| Fraser | 81.1°F | 81.0°F |
| Brisbane | 79.6°F | 79.9°F |
| Gold Coast | 74.9°F | 76.7°F |
| Perth | 72.3°F | 73.0°F |
| Sydney | 71.4°F | 72.2°F |
| Adelaide | 67.6°F | 70.8°F |
| Melbourne | 64.4°F | 69.9°F |
| Tasmania | 58.1°F | 62.3°F |
Best time for vacation in Sydney
Sydney on a weather map
Places in Australia:
Name
°F
24 Hours Forecast
Sydney
Local time: 21:48
December 21, sunday
0000
72°F
NW
4 mph
4 mph
0300
70°F
NE
2 mph
2 mph
0600
73°F
SE
2 mph
2 mph
0900
84°F
S
4 mph
4 mph
1200
88°F
SW
9 mph
9 mph
1500
81°F
W
6 mph
6 mph
1800
77°F
W
6 mph
6 mph
2100
73°F
NW
7 mph
7 mph
