O'Sullivan Beach Weather Forecast

    • 13
    • 22

    Mostly clear

    • 11
    • 26

    Sunny

    • 15
    • 30

    Sunny

    • 18
    • 34

    Sunny

    • 21
    • 35

    Sunny

    • 18
    • 25

    Cloudy

    • 14
    • 22

    Cloudy

Today 25 Dec Adelaide

Clear. Winds southeasterly 25 to 35 km/h.

Adelaide Metropolitan Waters

Wind
Southeasterly 15 to 20 knots, reaching up to 25 knots north of Grange in the evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres north of Brighton.
1st Swell
West to southwesterly below 0.5 metres.
Weather
Clear.
Weather Situation
A high pressure centre lies south of the Bight and will slowly continue eastwards on Friday, to be south of Tasmania on Saturday. The next cold front crosses south of the Bight on Sunday dragging a low pressure trough across western parts of the State. The trough is expected to reach central parts on Monday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

O'Sullivan Beach Temperature Statistics View More

December Temperature

Noarlunga (5km)

  • Lowest 2 December, 2025

    11.1 °C

  • Average December

    20.9 °C

  • Highest 14 December, 2025

    40.6 °C

Climate (2020–Present)

Noarlunga (5km)

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  • Average Low 2020–2025

    12.7 °C

  • Average 2020–2025

    16.6 °C

  • Average High 2020–2025

    21.7 °C
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