O'Sullivan Beach Weather Forecast

    • 15
    • 27

    Partly cloudy

    • 15
    • 30

    Sunny

    • 19
    • 33

    Mostly sunny

    • 15
    • 25

    Mostly sunny

    • 13
    • 23

    Cloudy

    • 13
    • 22

    Cloudy

    • 11
    • 27

    Sunny

Today 10 Dec Adelaide

Partly cloudy. Slight chance of a shower about the hills and southern suburbs in the late morning and early afternoon. Near zero chance of rain elsewhere. Winds southeasterly 15 to 25 km/h increasing to 20 to 30 km/h in the late evening.

Adelaide Metropolitan Waters

Wind
Southeasterly 10 to 15 knots, reaching up to 20 knots south of Brighton in the evening.
Seas
Below 1 metre.
1st Swell
West to southwesterly below 0.5 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system over the Bight extends a ridge of high pressure over most of the state and will persist over southern SA during today and Thursday. Meanwhile, a trough of low pressure over the far northwest is expected to move along the northern border today. The trough will extend further south on Thursday then move eastwards across the west and south of SA on Friday. Another ridge of high pressure will move over the south over the weekend and the trough will move slowly northeastwards.
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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

    18.5 °C

  • Highest 4 December, 2025

    32.3 °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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