Stack Island Weather Forecast

    • 10
    • 20

    Clear

    • 13
    • 21

    Mostly sunny

    • 14
    • 23

    Shower or two

    • 14
    • 22

    Showers increasing

    • 10
    • 16

    Possible shower. Windy

    • 11
    • 18

    Possible shower

    • 10
    • 22

    Sunny

Today 12 Sep Illawarra

Clear. Light winds.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Northerly 15 to 20 knots.
Seas
Around 1 metre, increasing to 1 to 1.5 metres offshore south of Point Perpendicular.
1st Swell
Southerly 1.5 metres.
Weather
Clear.
Weather Situation
A high pressure system will drift across the Tasman Sea this weekend, causing winds to turn northeasterly. Northerly winds are expected to increase on Monday before turning southerly in the far south. This southerly change will continue to move north along the coast on Tuesday and strengthen.
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 9 September, 2026

    9.5 °C

  • Average September

    16.9 °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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