Mouth Flat Beach Weather Forecast

    • 12
    • 19

    Partly cloudy

    • 12
    • 25

    Partly cloudy

    • 16
    • 22

    Partly cloudy

    • 13
    • 24

    Sunny

    • 16
    • 24

    Partly cloudy

    • 16
    • 23

    Shower

    • 13
    • 20

    Partly cloudy

Today 20 Apr Kangaroo Island

Partly cloudy. Winds southeasterly 15 to 25 km/h turning easterly 15 to 20 km/h during the afternoon and evening. Daytime maximum temperatures around 20.

South Central Coastal Waters

Wind
Easterly about 10 knots increasing to 10 to 15 knots in the middle of the day.
Seas
Around 1 metre.
1st Swell
Southwesterly 1.5 to 2 metres.
Weather
Partly cloudy.
Weather Situation
A strong high pressure system east of Tasmania will maintain a ridge over SA this week. A cold front is expected to weaken and slide across western and southern coasts during Tuesday and Wednesday. A second cold front may pass over the south again on Saturday with a high pressure system to follow over waters south of the Bight on Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mouth Flat Beach Temperature Statistics View More

April Temperature

Cape Willoughby (17km)

  • Lowest 11 April, 2026

    10.5 °C

  • Average April

    16.5 °C

  • Highest 6 April, 2026

    25.4 °C

Climate (2021–Present)

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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