Simpsons Bay Weather Forecast
- 12
- 19
Clear
- 10
- 21
Mostly sunny
- 13
- 23
Partly cloudy
- 13
- 18
Partly cloudy
- 13
- 18
Partly cloudy
- 12
- 20
Mostly sunny
- 15
- 24
Possible shower
Today 2 Sep Sydney
Partly cloudy. Slight chance of a shower in the late morning and afternoon. Light winds becoming northeasterly 15 to 20 km/h in the late afternoon then becoming light in the evening.
Sydney Coastal Waters
Broken Bay to Port Hacking- Wind
- Variable about 10 knots becoming north to northeasterly 10 to 15 knots in the late afternoon. Winds reaching up to 20 knots offshore in the late evening.
- Seas
- Below 1 metre.
- 1st Swell
- Southerly 1.5 metres inshore, increasing to 1.5 to 2 metres offshore.
- Weather
- Mostly sunny. The chance of a thunderstorm offshore.
- Weather Situation
- A high pressure system with its centre near South Australia is extending a ridge across the state, and this ridge will be the dominant feature for the next couple of days as its centre slowly moves eastwards. A trough is forecast to brush the south and along the coast mid to late this week, and this system will be followed by another high pressure ridge drifting across the state during the weekend.
Simpsons Bay Temperature Statistics View More
September Temperature
Sydney Airport (15km)
Lowest 1 September, 2025
9 °CAverage September
12.5 °CHighest
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Climate (2020–Present)
Sydney Airport (15km)
Average Low 2020–2025
14.7 °CAverage 2020–2025
18.6 °CAverage High 2020–2025
23.3 °C