Stack Island Weather Forecast
- 13
- 18
Mostly clear
- 10
- 20
Mostly sunny
- 13
- 24
Sunny
- 16
- 26
Mostly sunny
- 18
- 25
Rain
- 15
- 20
Shower or two
- 14
- 20
Possible shower
Today 28 Sep Illawarra
Mostly clear. Light winds.
Illawarra Coastal Waters
Port Hacking to Ulladulla- Wind
- Variable about 10 knots.
- Seas
- Below 1 metre.
- 1st Swell
- Southerly 1.5 metres.
- Weather
- Partly cloudy.
- Weather Situation
- A high pressure system west of Tasmania is directing onshore east to southeasterly airstream over the coastal waters while heading eastwards. Winds will turn north to northeasterly from Tuesday onwards as the high enters the Tasman Sea tonight or early Tuesday. A trough is then forecast to cross the southern and central parts of the coast late Thursday into Friday, with a southerly wind change in its wake.
Stack Island Temperature Statistics View More
September Temperature
Kiama (Bombo Headland) (3km)
Lowest 18 September, 2026
9.3 °CAverage September
17.1 °CHighest 5 September, 2026
29.8 °C
Climate (2021–2026)
Kiama (Bombo Headland) (3km)
Average Low 2021–2026
14.9 °CAverage 2021–2026
17.9 °CAverage High 2021–2026
21.5 °C