Port Bonython Weather Forecast

    • 19
    • 26

    Clear

    • 16
    • 23

    Becoming windy. Partly cloudy

    • 14
    • 23

    Becoming windy. Partly cloudy

    • 15
    • 29

    Sunny

    • 17
    • 35

    Sunny

    • 20
    • 39

    Mostly sunny

    • 22
    • 34

    Partly cloudy

Today 13 Dec Whyalla

Clear. Winds southerly 30 to 40 km/h.

Spencer Gulf Coastal Waters

Wind
Southwesterly 15 to 20 knots, reaching up to 25 knots north of Cowell to Wallaroo.
Seas
1.5 to 2 metres.
1st Swell
South to southwesterly below 1 metre, increasing to around 1 metre south of Cowell to Wallaroo.
Weather
Partly cloudy.
Weather Situation
A high pressure system south of WA extends a ridge over SA. This will persist as the high slowly moves eastwards into the Bight on Sunday, and out to the Tasman Sea by late Tuesday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Port Bonython Temperature Statistics View More

December Temperature

Whyalla Airport (24km)

  • Lowest 2 December, 2025

    10.2 °C

  • Average December

    21.9 °C

  • Highest 4 December, 2025

    40.7 °C

Climate (2020–Present)

Whyalla Airport (24km)

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  • Average Low 2020–2025

    11.8 °C

  • Average 2020–2025

    17.4 °C

  • Average High 2020–2025

    23.7 °C
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