Current sea water temperature:
+36.5°F
| Minimum sea water temperature in December: | 45.5°F |
| Maximum sea water temperature in December: | 36.5°F |
| Average sea water temperature in December: | 40.1°F |
| more information | |
14 days
forecast
forecast
| Sydney |
monthly
weather
weather
| Sydney |
Sea water temperature for the last 10 days:
| December 29 | 36.5°F | December 24 | 37.6°F |
| December 28 | 36.9°F | December 23 | 37.8°F |
| December 27 | 37.4°F | December 22 | 37.8°F |
| December 26 | 37.4°F | December 21 | 37.8°F |
| December 25 | 37.6°F | December 20 | 38.1°F |
Monthly sea water temperature, °F
When is the warmest sea in Sydney?
Based on the data about daily sea water temperature for the last three years the warmest sea in Sydney was noticed in August, September and July.
Monthly Sea Temperatures in Sydney, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 67.5°F. The highest and lowest sea temperatures during the month were 69.8°F and 65.8°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 64.8°F. The highest and lowest sea temperatures during the month were 68.2°F and 60.6°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 63.7°F. The highest and lowest sea temperatures during the month were 68.5°F and 56.8°F.
current
weather
weather
| Sydney |
weather in
January
January
| Sydney |
Best time for vacation in Sydney
Sydney on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Sydney
Local time: 03:58
December 29, monday
0600
27°F
SE
7 mph
7 mph
0900
27°F
SE
6 mph
6 mph
1200
30°F
S
7 mph
7 mph
1500
30°F
S
3 mph
3 mph
1800
30°F
S
1 mph
1 mph
2100
30°F
W
1 mph
1 mph
December 30, tuesday
0000
30°F
NW
5 mph
5 mph
0300
32°F
NW
10 mph
10 mph
