World Resorts Australia Sydney Weather

Sydney Sea Temperature in December

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 71.1°F. The highest and lowest sea temperatures during the month were 72.7°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 87.5°F 88.2°F
Cairns 83.8°F 84.4°F
Fraser 81.1°F 81.0°F
Brisbane 79.6°F 79.9°F
Gold Coast 74.6°F 76.7°F
Perth 71.9°F 73.0°F
Sydney 71.1°F 72.2°F
Adelaide 67.2°F 70.8°F
Melbourne 64.0°F 69.9°F
Tasmania 57.6°F 62.3°F

Best time for vacation in Sydney

Sunniest months:
July 19 days
May 18 days
August 18 days
Warmest months:
January 78.3 °F
February 77.6 °F
March 76.3 °F
Warmest sea temp:
February 74.1 °F
March 73.7 °F
January 73.2 °F
Coldest months:
July 61.7 °F
June 61.9 °F
August 63.1 °F
Rainiest months:
June 4 days
March 4 days
November 3 days
Windiest months:
January 11.0 mph
December 11.0 mph
November 10.8 mph

Sydney on a weather map

Current weather
07:21
Sydney
+66°F
SW 5 mph
Feels like: +66°F
Precip.: 100%
Places in Australia:
Name
°F
Adelaide
+72°F
Brisbane
+70°F
Gold Coast
+70°F
Darwin
+79°F
Canberra
+55°F
Cairns
+75°F
Melbourne
+55°F
Perth
+68°F
Sydney
+66°F
Tasmania
+52°F
Fraser
+77°F
24 Hours Forecast
Sydney
Local time: 07:21
December 17, wednesday
0900
72°F
SW
10 mph
1200
73°F
SW
15 mph
1500
73°F
SW
17 mph
1800
70°F
SW
17 mph
2100
68°F
SW
14 mph
December 18, thursday
0000
68°F
SW
11 mph
0300
66°F
S
8 mph
0600
68°F
S
6 mph
Units of measurement: °C / °F