Port Bonython Weather Forecast

    • 18
    • 29

    Sunny

    • 19
    • 31

    Partly cloudy

    • 19
    • 31

    Partly cloudy

    • 19
    • 36

    Becoming windy. Partly cloudy

    • 19
    • 26

    Becoming windy. Partly cloudy

    • 15
    • 24

    Becoming windy. Mostly sunny

    • 16
    • 24

    Becoming windy. Partly cloudy

Today 9 Dec Whyalla

Sunny. Winds southerly 25 to 40 km/h.

Spencer Gulf Coastal Waters

Wind
South to southeasterly 15 to 20 knots, reaching up to 25 knots north of Cowell to Wallaroo in the evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
South to southwesterly below 1 metre, increasing to 1 to 1.5 metres south of Cowell to Wallaroo during the afternoon.
Weather
Mostly sunny.
Weather Situation
A broad ridge extends over coastal waters. From today another high pressure system develops south of the Bight, strengthening the ridge. A trough is expected to move across coastal waters on Friday.
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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

    20.8 °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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