Mouth Flat Beach Weather Forecast

    • 7
    • 19

    Clear

    • 12
    • 20

    Sunny

    • 15
    • 20

    Partly cloudy

    • 11
    • 14

    Cloudy

    • 9
    • 17

    Partly cloudy

    • 10
    • 20

    Partly cloudy

    • 13
    • 22

    Partly cloudy

Today 18 Sep Kangaroo Island

Clear. Winds northwesterly 15 to 25 km/h.

South Central Coastal Waters

Wind
Northwesterly 15 to 20 knots.
Seas
1 to 1.5 metres.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Clear.
Weather Situation
A high pressure system centred over NSW will extend a ridge westwards over SA during Friday and Saturday. A cold front will approach from the west late Saturday then move across SA on Sunday. Another high pressure system will move eastwards across waters to the south during Monday then over Victoria on Tuesday.
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

    13.4 °C

  • Highest 12 September, 2026

    20.3 °C

Climate (2021–2026)

Cape Willoughby (17km)

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  • Average Low 2021–2026

    13.3 °C

  • Average 2021–2026

    15.4 °C

  • Average High 2021–2026

    18.4 °C
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