Mona Vale Beach Weather Forecast
- 19
- 24
Partly cloudy
- 19
- 29
Sunny
- 23
- 32
Sunny morning. Possible storm
- 22
- 29
Shower or two. Possible storm
- 21
- 34
Possible shower or storm
- 21
- 29
Sunny
- 20
- 28
Shower or two
Today 17 Dec Sydney
Partly cloudy. Light winds becoming northerly 15 to 20 km/h in the morning then tending northeasterly 20 to 30 km/h in the middle of the day.
Sydney Coastal Waters
Broken Bay to Port Hacking- Wind
- Northeasterly about 10 knots increasing to 15 to 20 knots in the middle of the day.
- Seas
- Below 1 metre, increasing to 1 to 1.5 metres around midday.
- 1st Swell
- Southerly 1.5 to 2 metres, decreasing to 1.5 metres around midday.
- Weather
- Partly cloudy.
- Weather Situation
- A trough over inland Queensland extends into the far north of the state, while a high in the Tasman Sea extends a ridge across the south and east. Then, a series of troughs are forecast to enter the state's west and slip south later in the week through the weekend, drawing heat and moisture into the state.
Mona Vale Beach Temperature Statistics View More
December Temperature
Terrey Hills (8km)
Lowest 3 December, 2025
11.3 °CAverage December
20.7 °CHighest 6 December, 2025
39.9 °C
Climate (2020–Present)
Terrey Hills (8km)
Average Low 2020–2025
13.4 °CAverage 2020–2025
16.9 °CAverage High 2020–2025
21.8 °C