Mouth Flat Beach Weather Forecast

    • 10
    • 21

    Sunny

    • 15
    • 22

    Shower

    • 13
    • 19

    Cloudy

    • 12
    • 24

    Partly cloudy

    • 17
    • 23

    Partly cloudy

    • 13
    • 23

    Partly cloudy

    • 16
    • 25

    Partly cloudy

Today 18 Apr Kangaroo Island

Sunny. Winds east to northeasterly 15 to 20 km/h tending north to northeasterly 15 to 25 km/h during the morning. Daytime maximum temperatures in the low 20s.

South Central Coastal Waters

Wind
Northeasterly 15 to 20 knots turning northerly 10 to 15 knots in the evening.
Seas
1 to 1.5 metres.
1st Swell
Southwesterly 1.5 to 2.5 metres.
Weather
Mostly sunny. The chance of a thunderstorm west of Kangaroo Island late this afternoon and evening.
Weather Situation
A high pressure system south of the Bight extends a ridge over SA. The high will slowly move east over the weekend ahead of a cold front which will slip to the south of SA and weaken. The high will remain near stationary in the southern Tasman Sea, maintaining a ridge across the state early next week.
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

    16.3 °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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