Mouth Flat Beach Weather Forecast

    • 10
    • 20

    Partly cloudy

    • 12
    • 22

    Partly cloudy

    • 12
    • 18

    Cloudy

    • 11
    • 21

    Partly cloudy

    • 15
    • 23

    Partly cloudy

    • 13
    • 20

    Cloudy

    • 13
    • 24

    Partly cloudy

Today 15 Apr Kangaroo Island

The chance of morning fog. Sunny afternoon. Light winds becoming northwesterly 15 to 20 km/h in the middle of the day then becoming light in the late afternoon. Daytime maximum temperatures in the low 20s.

South Central Coastal Waters

Wind
Northwesterly 10 to 15 knots.
Seas
Around 1 metre.
1st Swell
Southwesterly 1.5 metres, increasing to 1.5 to 2.5 metres during the morning.
Weather
Partly cloudy.
Weather Situation
A high pressure system centred over the south of SA will move slowly eastwards this week and a cold front will move across the far southeast of SA on Thursday. A second high pressure system is expected to follow and will become established south of the Bight late Thursday then will move eastwards during Friday and Saturday. A trough will move over the far west on Saturday.
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

    16.2 °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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