Mouth Flat Beach Weather Forecast

    • 12
    • 18

    Cloudy

    • 12
    • 21

    Sunny

    • 13
    • 33

    Sunny

    • 17
    • 35

    Sunny

    • 17
    • 25

    Partly cloudy

    • 13
    • 21

    Partly cloudy

    • 13
    • 24

    Shower

Today 15 Dec Kangaroo Island

Partly cloudy. Winds southerly 20 to 30 km/h turning southeasterly in the early afternoon. Daytime maximum temperatures between 18 and 21.

South Central Coastal Waters

Wind
Southerly 10 to 15 knots turning southeasterly in the afternoon. Winds reaching up to 20 knots inshore during the afternoon and evening.
Seas
Around 1 metre.
1st Swell
Southwesterly 3 to 4 metres, decreasing to 3 metres during the afternoon.
Weather
Cloudy.
Weather Situation
A high pressure system in the Bight, maintains a ridge over SA as it slowly moves eastwards and out to the Tasman Sea by Wednesday. A trough of low pressure forecast to drift into the far northeast of SA late Wednesday, slowing moving south during Thursday.
Graph Plots Open in Graphs

  • 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

    16.9 °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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