Mouth Flat Beach Weather Forecast

    • 11
    • 15

    Cloudy

    • 10
    • 14

    Cloudy

    • 9
    • 15

    Partly cloudy

    • 9
    • 19

    Sunny

    • 12
    • 21

    Sunny

    • 15
    • 20

    Partly cloudy

    • 11
    • 16

    Cloudy

Today 15 Sep Kangaroo Island

Cloudy. Winds southerly 20 to 30 km/h turning southeasterly 15 to 25 km/h in the evening.

South Central Coastal Waters

Wind
Southerly 15 to 20 knots turning southeasterly in the evening.
Seas
1 to 1.5 metres.
1st Swell
Southwesterly 4 metres.
Weather
Cloudy.
Weather Situation
A high pressure ridge will be persistent over SA during the week, with a high moving across waters to the south to be centred over Victoria later Thursday and then over eastern NSW later Friday. The next cold front is likely to approach from the west late Saturday and move across SA on Sunday.
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  • 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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