Stack Island Weather Forecast

    • 13
    • 19

    Mostly clear

    • 13
    • 19

    Shower or two

    • 13
    • 19

    Showers easing

    • 15
    • 19

    Showers

    • 15
    • 21

    Shower or two

    • 14
    • 19

    Showers increasing

    • 11
    • 16

    Shower or two

Today 20 May Illawarra

Mostly sunny. Winds south to southwesterly 15 to 20 km/h becoming light in the late afternoon then becoming west to southwesterly 15 to 20 km/h in the late evening. Daytime maximum temperatures between 15 and 19.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
Southwesterly 20 to 25 knots turning southerly in the evening. Winds reaching up to 30 knots offshore south of Port Kembla in the late morning and again in the evening.
Seas
1.5 to 2.5 metres.
1st Swell
Southerly 2 to 2.5 metres.
Weather
Partly cloudy. 70% chance of showers. The chance of a thunderstorm offshore in the late afternoon and evening.
Weather Situation
A high pressure ridge establishing in the area during today with a trough and low pressure system further offshore and remaining over the Tasman Sea for the next several days, whipping fresh to strong southerly winds and large powerful waves to the coastline mid to late this week.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Stack Island Temperature Statistics View More

May Temperature

Kiama (Bombo Headland) (3km)

  • Lowest 8 May, 2026

    10.1 °C

  • Average May

    17.7 °C

  • Highest 2 May, 2026

    23.4 °C

Climate (2021–Present)

Kiama (Bombo Headland) (3km)

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  • Average Low 2021–2026

    14.8 °C

  • Average 2021–2026

    17.8 °C

  • Average High 2021–2026

    21.5 °C
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