James Cook Island Weather Forecast
- 19
- 29
Becoming windy. Partly cloudy
- 19
- 20
Possible shower
- 18
- 20
Cloudy
- 19
- 24
Partly cloudy
- 18
- 27
Sunny
- 20
- 29
Partly cloudy
- 21
- 27
Shower or two
Today 14 Dec Sydney
Partly cloudy. Slight chance of a shower. Winds northwesterly 15 to 20 km/h shifting southerly 35 to 55 km/h in the late evening.
Sydney Enclosed Waters
Sydney Harbour, Pittwater and Botany Bay- Wind
- Northwesterly 15 to 20 knots tending north to northeasterly in the late afternoon then tending southerly 20 to 30 knots in the late evening.
- Seas
- Below 0.5 metres.
- Weather
- Partly cloudy.
- Weather Situation
- A trough will move across the state's south and west today as a cold front passes to the south. Then, the system will cross Sydney Waters this evening, bringing a fresh to strong southerly wind change in its wake. Southerly winds will gradually ease and turn east to southeasterly early next week as a new high enters the Bight and extends a ridge across the coastal waters.
James Cook Island Temperature Statistics View More
December Temperature
Sydney Airport (9km)
Lowest 2 December, 2025
13.4 °CAverage December
22.5 °CHighest 6 December, 2025
39.2 °C
Climate (2020–Present)
Sydney Airport (9km)
Average Low 2020–2025
14.8 °CAverage 2020–2025
18.6 °CAverage High 2020–2025
23.3 °C