Port Bonython Weather Forecast

    • 20
    • 38

    Windy. Partly cloudy

    • 19
    • 26

    Windy. Cloud clearing

    • 16
    • 23

    Becoming windy. Partly cloudy

    • 13
    • 24

    Becoming windy. Partly cloudy

    • 15
    • 29

    Sunny

    • 17
    • 35

    Sunny

    • 20
    • 39

    Sunny

Today 12 Dec Whyalla

Partly cloudy. The chance of a thunderstorm early this evening. Winds southerly 30 to 45 km/h.

Extreme Fire Danger Rating

Take action now to protect life and property

Spencer Gulf Coastal Waters

Wind
Southerly 15 to 25 knots, reaching up to 30 knots north of Cowell to Wallaroo in the evening.
Seas
Around 1 metre, increasing to 1.5 to 2 metres by early evening.
1st Swell
South to southwesterly below 1 metre, increasing to around 1 metre south of Cowell to Wallaroo.
Weather
Mostly clear. The chance of a thunderstorm.
Weather Situation
A trough will move eastwards to clear South East coastal waters during Friday evening. A slow moving broad high pressure system in the Indian Ocean will then build a ridge across coastal waters on Saturday and establish itself south of the Bight on Sunday and Monday. The high is forecast to move east into the Tasman Sea on Tuesday while maintaining a ridge over coastal waters.
Graph Plots Open in Graphs

  • 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

    21.6 °C

  • Highest 4 December, 2025

    40.7 °C

Climate (2020–Present)

Whyalla Airport (24km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    11.8 °C

  • Average 2020–2025

    17.4 °C

  • Average High 2020–2025

    23.7 °C
Get WillyWeather+ to remove ads