Port Bonython Weather Forecast

    • 6
    • 19

    Clear

    • 8
    • 26

    Mostly sunny

    • 10
    • 23

    Sunny

    • 9
    • 17

    Cloudy

    • 8
    • 20

    Partly cloudy

    • 11
    • 17

    Partly cloudy

    • 9
    • 17

    Partly cloudy

Today 17 Sep Whyalla

Partly cloudy. Light winds becoming east to northeasterly 15 to 20 km/h in the middle of the day then becoming light in the evening.

Spencer Gulf Coastal Waters

Wind
East to northeasterly 10 to 15 knots tending north to northeasterly below 10 knots in the evening.
Seas
Below 1 metre.
1st Swell
South to southwesterly around 1 metre, increasing to 1 to 2 metres south of Cowell to Wallaroo.
Weather
Clear.
Weather Situation
A high pressure system over the state will move east tonight to be over NSW Thursday morning. A weak trough will move over South Australian waters on Thursday. A cold front will pass over the south on Friday followed by a southwesterly flow that is expected to persist through the weekend owing to a ridge of high pressure extending over northern parts of the state.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Port Bonython Temperature Statistics View More

September Temperature

Whyalla Airport (24km)

  • Lowest 1 September, 2025

    2.8 °C

  • Average September

    15.3 °C

  • Highest 6 September, 2025

    33.8 °C

Climate (2020–Present)

Whyalla Airport (24km)

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  • Average Low 2020–2025

    11.9 °C

  • Average 2020–2025

    17.5 °C

  • Average High 2020–2025

    23.8 °C
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