Mouth Flat Beach Weather Forecast

    • 10
    • 14

    Cloudy

    • 9
    • 15

    Partly cloudy

    • 8
    • 18

    Sunny

    • 12
    • 20

    Sunny

    • 14
    • 19

    Partly cloudy

    • 11
    • 15

    Cloudy

    • 9
    • 17

    Partly cloudy

Today 16 Sep Kangaroo Island

Cloudy. Winds southeasterly 15 to 25 km/h. Daytime maximum temperatures around 15.

South Central Coastal Waters

Wind
Southeasterly 10 to 15 knots.
Seas
Below 1 metre.
1st Swell
Southwesterly 4 metres.
Weather
Cloudy.
Weather Situation
A strong high pressure system south of the state will maintain a ridge across SA for the next few days as it drifts eastwards. A cold front is likely to approach from the west late Saturday and move across SA on Sunday.
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

    13.6 °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

    18.5 °C
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