Mouth Flat Beach Weather Forecast

    • 14
    • 19

    Cloudy

    • 12
    • 15

    Shower

    • 10
    • 15

    Shower

    • 11
    • 19

    Windy

    • 15
    • 25

    Partly cloudy

    • 14
    • 21

    Shower

    • 12
    • 20

    Shower

Today 25 Sep Kangaroo Island

Cloudy. Medium chance of showers, most likely in the afternoon. The chance of a thunderstorm. Winds southerly 15 to 20 km/h turning southeasterly in the early afternoon. Daytime maximum temperatures between 17 and 20.

South Central Coastal Waters

Wind
South to southeasterly about 10 knots increasing to 10 to 15 knots in the early afternoon.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 to 2 metres.
Weather
Cloudy. The chance of a thunderstorm in the late morning and afternoon.
Weather Situation
A low pressure trough extends from WA over western SA. This trough will be very slow-moving for the rest of this week and over the weekend. A weakening cold front will slip across southern coasts during today. Another low pressure trough will develop over WA on Sunday and Monday then move over SA early to mid next week.
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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