Mouth Flat Beach Weather Forecast

    • 12
    • 25

    Partly cloudy

    • 17
    • 22

    Partly cloudy

    • 13
    • 25

    Partly cloudy

    • 17
    • 24

    Partly cloudy

    • 17
    • 24

    Shower

    • 13
    • 20

    Cloudy

    • 12
    • 20

    Partly cloudy

Today 21 Apr Kangaroo Island

Sunny. Winds northerly 20 to 30 km/h. Daytime maximum temperatures in the mid to high 20s.

South Central Coastal Waters

Wind
North to northeasterly 15 to 20 knots tending north to northwesterly during the afternoon and evening.
Seas
1 to 1.5 metres.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Sunny.
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 on 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

    16.4 °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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