Mouth Flat Beach Weather Forecast

    • 11
    • 14

    Partly cloudy

    • 9
    • 16

    Sunny

    • 9
    • 19

    Partly cloudy

    • 13
    • 22

    Shower

    • 14
    • 20

    Shower

    • 13
    • 19

    Partly cloudy

    • 14
    • 23

    Partly cloudy

Today 21 Sep Kangaroo Island

Partly cloudy. Winds southeasterly 15 to 25 km/h.

South Central Coastal Waters

Wind
Southeasterly 10 to 15 knots turning easterly in the evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 4 to 5 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system centred to the southeast will continue to move eastwards over Victoria and over the Tasman Sea on Tuesday. This high will continue to extend a ridge westwards over SA ahead of a low pressure trough that is expected to move over the far west of SA during Wednesday. The trough will slip southeastwards over southern coasts during Thursday and Friday.
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

    13.9 °C

  • Highest 19 September, 2026

    21.9 °C

Climate (2021–2026)

Cape Willoughby (17km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    13.3 °C

  • Average 2021–2026

    15.4 °C

  • Average High 2021–2026

    18.5 °C
Get WillyWeather+ to remove ads