Stack Island Weather Forecast

    • 11
    • 16

    Shower or two

    • 9
    • 16

    Shower or two

    • 9
    • 18

    Mostly sunny

    • 11
    • 15

    Shower or two

    • 12
    • 18

    Sunny

    • 12
    • 18

    Mostly sunny

    • 11
    • 16

    Shower or two

Today 9 Jul Illawarra

Partly cloudy. Slight chance of a shower near the coast, near zero chance elsewhere. Light winds.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
South to southeasterly 10 to 15 knots decreasing to below 10 knots in the evening.
Seas
Below 1 metre.
1st Swell
Southeasterly 2 to 2.5 metres.
Weather
Partly cloudy. 70% chance of showers.
Weather Situation
A strong high pressure system in the Tasman Sea maintains a ridge over the southern half of the coast while a weak trough develops off the northern half of the coast. Winds will gradually ease before turning northerly and freshening from Saturday as the ridge extends over the northern coastal waters. Then, a cold front and trough crosses the coastal waters later in the weekend, bringing fresh westerly winds in it's wake.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Stack Island Temperature Statistics View More

July Temperature

Kiama (Bombo Headland) (3km)

  • Lowest 5 July, 2026

    10.4 °C

  • Average July

    14.2 °C

  • Highest 2 July, 2026

    22.2 °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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