Mansion Bay Weather Forecast
- 19
- 29
Windy. Partly cloudy
- 19
- 20
Possible shower
- 18
- 20
Cloudy
- 19
- 24
Partly cloudy
- 19
- 28
Sunny
- 21
- 30
Mostly sunny
- 21
- 29
Shower or two
Today 14 Dec Sydney
Mostly sunny day. Slight chance of a shower at night. Winds west to northwesterly 20 to 30 km/h shifting southerly 35 to 55 km/h in the late evening.
Sydney Coastal Waters
Broken Bay to Port Hacking- Wind
- North to northeasterly 15 to 20 knots shifting south to southeasterly 20 to 30 knots in the late evening.
- Seas
- Around 1 metre.
- 1st Swell
- Northeasterly around 1 metre.
- Weather
- Partly cloudy.
- Weather Situation
- A trough and gusty wind change will continue moving north across the coastal waters, crossing the northern waters on Monday morning and early afternoon. A ridge extends over the coastal waters in the wake of the trough. The ridge will be maintained by a high in the Great Australian Bight that will move east across southeast Australia on Tuesday and into the Tasman Sea on Wednesday.
Mansion Bay Temperature Statistics View More
December Temperature
Sydney Airport (15km)
Lowest 2 December, 2025
13.4 °CAverage December
22.5 °CHighest 6 December, 2025
39.2 °C
Climate (2020–Present)
Sydney Airport (15km)
Average Low 2020–2025
14.8 °CAverage 2020–2025
18.6 °CAverage High 2020–2025
23.3 °C