Mouth Flat Beach Weather Forecast

    • 9
    • 16

    Cloudy

    • 10
    • 19

    Partly cloudy

    • 10
    • 17

    Shower

    • 9
    • 15

    Shower

    • 10
    • 16

    Shower

    • 10
    • 15

    Cloudy

    • 9
    • 16

    Cloudy

Today 17 Sep Kangaroo Island

Partly cloudy. Slight chance of a shower. Winds westerly 15 to 20 km/h turning north to northwesterly 15 to 25 km/h in the early afternoon. Daytime maximum temperatures around 16.

South Central Coastal Waters

Wind
Westerly 15 to 20 knots turning northwesterly in the early afternoon.
Seas
1.5 metres, decreasing to 1 metre during the morning, then increasing to 1 to 1.5 metres by early evening.
1st Swell
Southwesterly 3 to 5 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure ridge will move in from the west and quickly tracks eastwards during the day with a weak trough sweeping across the coasts on Thursday. A cold front will skim southern coasts on Friday with a southwesterly airstream establishing in its wake on Saturday as a high pressure ridge develops over the Far West Coast and persists during the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mouth Flat Beach Temperature Statistics View More

September Temperature

Cape Willoughby (17km)

  • Lowest 12 September, 2025

    8.7 °C

  • Average September

    13.5 °C

  • Highest 6 September, 2025

    23.9 °C

Climate (2020–Present)

Cape Willoughby (17km)

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  • Average Low 2020–2025

    13.3 °C

  • Average 2020–2025

    15.4 °C

  • Average High 2020–2025

    18.4 °C
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