Mouth Flat Beach Weather Forecast

    • 12
    • 22

    Sunny

    • 12
    • 33

    Sunny

    • 17
    • 35

    Sunny

    • 17
    • 24

    Cloudy

    • 13
    • 21

    Shower

    • 13
    • 21

    Shower

    • 12
    • 21

    Cloudy

Today 16 Dec Kangaroo Island

Sunny. Winds east to southeasterly 15 to 25 km/h becoming light in the late evening. Daytime maximum temperatures in the low to high 20s.

South Central Coastal Waters

Wind
Easterly 10 to 15 knots.
Seas
Around 1 metre.
1st Swell
Southerly 1.5 to 2 metres, decreasing to 1.5 metres by early evening.
Weather
Clear.
Weather Situation
A high pressure system to the south of the state will maintain a ridge across SA as it drifts into the Tasman by Wednesday. A trough of low pressure will briefly enter the far northeast of SA with another trough slowing moving across the south and west on Thursday. A south to southwesterly flow will establish across the coasts on Friday.
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

    16.7 °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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