Mouth Flat Beach Weather Forecast

    • 14
    • 25

    Sunny

    • 14
    • 32

    Sunny

    • 18
    • 34

    Sunny

    • 15
    • 20

    Windy

    • 14
    • 20

    Windy

    • 13
    • 21

    Partly cloudy

    • 14
    • 24

    Cloudy

Today 27 Dec Kangaroo Island

Sunny. Winds east to northeasterly 15 to 25 km/h tending east to southeasterly in the evening then becoming light in the late evening. Daytime maximum temperatures in the mid to high 20s.

South Central Coastal Waters

Wind
Easterly 15 to 20 knots.
Seas
1 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly 1.5 metres.
Weather
Sunny.
Weather Situation
A high pressure system maintains a broad ridge over most of South Australia. A low pressure trough enters western parts of the state later today and continues moving east on Sunday, reaching central parts on Monday. The deepening trough moves into eastern parts of SA on Tuesday, while a new ridge builds across the west.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mouth Flat Beach Temperature Statistics View More

December Temperature

Cape Willoughby (17km)

  • Lowest 2 December, 2025

    10.7 °C

  • Average December

    17.1 °C

  • Highest 18 December, 2025

    35.9 °C

Climate (2020–Present)

Cape Willoughby (17km)

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  • Average Low 2020–2025

    13.3 °C

  • Average 2020–2025

    15.3 °C

  • Average High 2020–2025

    18.4 °C
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