Boat Harbour Beach Weather Forecast
- 13
- 20
Partly cloudy
- 13
- 23
Shower or two
- 18
- 21
Sunny
- 11
- 20
Partly cloudy
- 13
- 21
Shower or two
- 13
- 17
Shower or two
- 11
- 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 Coastal Waters
Broken Bay to Port Hacking- Wind
- West to southwesterly 10 to 15 knots becoming variable about 10 knots in the morning then becoming north to northeasterly 15 to 20 knots in the middle of the day. Winds reaching up to 25 knots offshore in the late evening.
- Seas
- Around 1 metre, increasing to 1 to 1.5 metres by early evening.
- 1st Swell
- Southerly 1 to 1.5 metres, increasing to 1.5 to 2 metres during the morning, then decreasing to 1.5 metres by early evening.
- Weather
- Mostly sunny.
- Weather Situation
- In the wake of a cold front, south to southwesterly winds will tend northerly and strengthen today as a high pressure system drifts across the coastal waters. Winds will shift west to southwesterly again over the weekend as a stronger cold front moves over NSW coastal waters, with southwesterly winds persisting into early next week as a series of fronts brush the south of the state.
Boat Harbour Beach Temperature Statistics View More
September Temperature
Sydney Airport (10km)
Lowest 1 September, 2025
9 °CAverage September
17.7 °CHighest 8 September, 2025
30.1 °C
Climate (2020–Present)
Sydney Airport (10km)
Average Low 2020–2025
14.7 °CAverage 2020–2025
18.6 °CAverage High 2020–2025
23.3 °C