Mouth Flat Beach Weather Forecast

    • 14
    • 19

    Shower

    • 12
    • 16

    Shower

    • 10
    • 15

    Windy

    • 11
    • 20

    Partly cloudy

    • 16
    • 24

    Shower

    • 14
    • 20

    Shower

    • 12
    • 20

    Shower

Today 25 Sep Kangaroo Island

Cloudy. High chance of showers, most likely in the early morning. The chance of a thunderstorm from the late morning. Light winds becoming southerly 15 to 20 km/h in the middle of the day then tending southeasterly in the early afternoon. Overnight temperatures falling to around 12 with daytime temperatures reaching between 17 and 20.

South Central Coastal Waters

Wind
Variable below 10 knots becoming south to southeasterly 10 to 15 knots in the morning.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 metres, increasing to 1.5 to 2 metres during the morning.
Weather
Cloudy. 60% chance of showers. The chance of a thunderstorm in the late morning and afternoon.
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 2 September, 2026

    9.9 °C

  • Average September

    14 °C

  • Highest 20 September, 2026

    22.3 °C

Climate (2021–2026)

Cape Willoughby (17km)

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  • Average Low 2021–2026

    13.4 °C

  • Average 2021–2026

    15.4 °C

  • Average High 2021–2026

    18.5 °C
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