Stack Island Weather Forecast

    • 16
    • 24

    Partly cloudy

    • 17
    • 28

    Late shower or two

    • 13
    • 17

    Showers

    • 13
    • 18

    Cloudy

    • 12
    • 20

    Partly cloudy

    • 13
    • 23

    Sunny

    • 15
    • 24

    Partly cloudy

Today 25 Sep Illawarra

Partly cloudy. The chance of fog in the early morning. Slight chance of a shower in the north in the late morning and afternoon. Near zero chance of rain elsewhere. The chance of a thunderstorm in the afternoon and evening. Light winds becoming northwest to northeasterly 15 to 25 km/h in the morning then becoming light in the late afternoon. Overnight temperatures falling to between 11 and 15 with daytime temperatures reaching around 30.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Northerly 15 to 25 knots.
Seas
1.5 to 2 metres.
1st Swell
Northeasterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore south of Port Kembla by early evening.
Weather
Sunny.
Weather Situation
A high pressure system over the Tasman Sea directs a northeasterly flow through the coastal waters. A cold front and trough will enter the Tasman Sea early Saturday, bringing a southerly change which will gradually track northward through the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Stack Island Temperature Statistics View More

September Temperature

Kiama (Bombo Headland) (3km)

  • Lowest 18 September, 2026

    9.3 °C

  • Average September

    17 °C

  • Highest 5 September, 2026

    29.8 °C

Climate (2021–2026)

Kiama (Bombo Headland) (3km)

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  • Average Low 2021–2026

    14.9 °C

  • Average 2021–2026

    17.9 °C

  • Average High 2021–2026

    21.5 °C
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