Port Bonython Weather Forecast

    • 22
    • 39

    Sunny

    • 25
    • 32

    Mostly sunny

    • 18
    • 27

    Partly cloudy

    • 18
    • 26

    Shower or two then sunny

    • 15
    • 24

    Cloud clearing

    • 16
    • 24

    Cloud clearing

    • 15
    • 25

    Sunny

Today 18 Dec Whyalla

Sunny. Winds northerly 20 to 30 km/h turning east to northeasterly 15 to 25 km/h in the afternoon.

Extreme Fire Danger Rating

Take action now to protect life and property

Spencer Gulf Coastal Waters

Wind
North to northeasterly 10 to 15 knots tending northeast to southeasterly in the late afternoon then tending southeast to southwesterly in the evening. Winds reaching up to 20 knots north of Cowell to Wallaroo in the evening.
Seas
Around 1 metre.
1st Swell
South to southwesterly below 1 metre.
Weather
Sunny.
Weather Situation
A ridge of high pressure extends across most of SA, as a trough of low pressure develops over the west today. This broad area of low pressure is expected to slowly move across the state from the west during Friday and Saturday, before another ridge of high pressure develops through the west and south on Sunday.
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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

    21.7 °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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