Current sea water temperature:
+42.8°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: | 40.4°F |
| more information | |
14 days
forecast
forecast
| Sydney |
monthly
weather
weather
| Sydney |
Sea water temperature for the last 10 days:
| December 5 | 42.8°F | November 30 | 44.1°F |
| December 4 | 43.3°F | November 29 | 43.7°F |
| December 3 | 43.7°F | November 28 | 43.9°F |
| December 2 | 43.5°F | November 27 | 44.1°F |
| December 1 | 43.9°F | November 26 | 44.2°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
December
December
| Sydney |
Best time for vacation in Sydney
Sydney on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Sydney
Local time: 05:58
December 05, friday
0600
19°F
E
22 mph
22 mph
0900
18°F
E
24 mph
24 mph
1200
23°F
SE
28 mph
28 mph
1500
25°F
E
27 mph
27 mph
1800
25°F
E
24 mph
24 mph
2100
23°F
E
20 mph
20 mph
December 06, saturday
0000
21°F
E
18 mph
18 mph
0300
23°F
E
17 mph
17 mph
