Stack Island Weather Forecast

    • 13
    • 18

    Partly cloudy

    • 11
    • 21

    Mostly sunny

    • 13
    • 24

    Sunny

    • 15
    • 25

    Mostly sunny

    • 17
    • 23

    Showers

    • 15
    • 19

    Shower or two

    • 14
    • 19

    Shower or two

Today 28 Sep Illawarra

Cloudy. Slight chance of a shower in the early morning. Light winds becoming east to southeasterly 15 to 20 km/h in the morning then becoming light in the middle of the day. Overnight temperatures falling to between 6 and 12 with daytime temperatures reaching between 15 and 19.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Southeasterly 10 to 15 knots becoming variable about 10 knots in the early afternoon.
Seas
Around 1 metre.
1st Swell
Southerly 1 to 1.5 metres.
Weather
Cloudy.
Weather Situation
Fresh south to southeasterly winds lie over the coastal waters in the wake of a cold front. A ridge of high pressure will build over the coastal waters through the early days of the week, turning winds north to northeasterly.
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

    17.1 °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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