Mouth Flat Beach Weather Forecast

    • 9
    • 15

    Shower

    • 8
    • 15

    Shower

    • 9
    • 15

    Shower

    • 8
    • 15

    Shower

    • 9
    • 15

    Partly cloudy

    • 9
    • 14

    Partly cloudy

    • 9
    • 16

    Partly cloudy

Today 11 Aug Kangaroo Island

Cloudy. Very high chance of showers. The chance of a thunderstorm in the afternoon and evening. Winds northwesterly 20 to 30 km/h increasing to 25 to 40 km/h in the early morning then turning southwesterly 20 to 30 km/h in the late evening. Overnight temperatures falling to around 8 with daytime temperatures reaching around 16.

South Central Coastal Waters

Wind
Northwesterly 15 to 25 knots, reaching up to 30 knots during the day. Winds turning southwesterly 20 to 25 knots in the evening.
Seas
1 to 2 metres, increasing to 2 to 3 metres during the morning.
1st Swell
Southwesterly 3 to 4 metres, decreasing to 3 metres during the morning, then increasing to 3 to 4 metres by early evening.
Weather
Cloudy. Near 100% chance of showers. The chance of a thunderstorm.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mouth Flat Beach Temperature Statistics View More

August Temperature

Cape Willoughby (17km)

  • Lowest 4 August, 2026

    8.9 °C

  • Average August

    12.5 °C

  • Highest 7 August, 2026

    17.4 °C

Climate (2021–2026)

Cape Willoughby (17km)

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  • Average Low 2021–2026

    13.3 °C

  • Average 2021–2026

    15.4 °C

  • Average High 2021–2026

    18.5 °C
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