Mouth Flat Beach Weather Forecast

    • 12
    • 19

    Cloudy

    • 12
    • 18

    Cloudy

    • 12
    • 21

    Partly cloudy

    • 13
    • 33

    Sunny

    • 17
    • 35

    Sunny

    • 16
    • 28

    Partly cloudy

    • 15
    • 23

    Partly cloudy

Today 14 Dec Kangaroo Island

Partly cloudy. Winds southwesterly 25 to 35 km/h turning southerly in the early afternoon. Daytime maximum temperatures around 20.

South Central Coastal Waters

Wind
Southwesterly 15 to 20 knots turning southerly in the late afternoon.
Seas
1 to 1.5 metres.
1st Swell
Southwesterly 2.5 to 3 metres, increasing to 3 to 4 metres during the afternoon.
Weather
Cloudy.
Weather Situation
A high pressure system south of WA extends a ridge over SA. This will persist as the high slowly moves eastwards into the Bight during today, and out to the Tasman Sea by late Tuesday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mouth Flat Beach Temperature Statistics View More

December Temperature

Cape Willoughby (17km)

  • Lowest 2 December, 2025

    10.7 °C

  • Average December

    17 °C

  • Highest 3 December, 2025

    27.7 °C

Climate (2020–Present)

Cape Willoughby (17km)

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  • Average Low 2020–2025

    13.3 °C

  • Average 2020–2025

    15.3 °C

  • Average High 2020–2025

    18.4 °C
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