Cowan Creek - Hallets Beach Weather Forecast
- 10
- 20
Sunny
- 10
- 24
Sunny day. Shower or two
- 16
- 21
Sunny
- 8
- 20
Mostly sunny
- 10
- 21
Possible shower developing
- 10
- 17
Possible shower
- 9
- 19
Sunny
Today 18 Sep Sydney
Mostly sunny. Winds west to southwesterly 15 to 20 km/h shifting northeasterly in the late morning then becoming light in the evening.
Sydney Enclosed Waters
Sydney Harbour, Pittwater and Botany Bay- Wind
- Variable below 10 knots becoming east to northeasterly 10 to 15 knots in the early afternoon then tending north to northeasterly 15 to 20 knots in the evening.
- Seas
- Below 0.5 metres.
- Weather
- Sunny.
- Weather Situation
- Southwesterly winds will persist over Sydney Waters this morning, in the wake of a cold front. Winds will tend northerly again and strengthen later today as a high pressure system drifts across the region. Winds will shift west to southwesterly again over the weekend as a stronger cold front moves over NSW coastal waters, with west to southwesterly winds persisting into early next week as a series of fronts brush the south of the state.
Cowan Creek - Hallets Beach Temperature Statistics View More
September Temperature
Terrey Hills (10km)
Lowest 1 September, 2025
7 °CAverage September
15.8 °CHighest 8 September, 2025
27.7 °C
Climate (2020–Present)
Terrey Hills (10km)
Average Low 2020–2025
13.4 °CAverage 2020–2025
16.9 °CAverage High 2020–2025
21.7 °C