Mouth Flat Beach Weather Forecast

    • 12
    • 19

    Partly cloudy

    • 9
    • 18

    Partly cloudy

    • 11
    • 18

    Partly cloudy

    • 13
    • 19

    Shower

    • 11
    • 17

    Shower

    • 11
    • 16

    Shower

    • 11
    • 16

    Shower

Today 20 May Kangaroo Island

Mostly sunny. Slight chance of a shower. Winds southwesterly 15 to 20 km/h becoming light in the middle of the day. Daytime maximum temperatures around 19.

South Central Coastal Waters

Wind
Southwesterly 10 to 15 knots becoming variable below 10 knots in the late afternoon.
Seas
Below 1 metre.
1st Swell
Southwesterly 2.5 metres.
Weather
Mostly sunny.
Weather Situation
A high pressure system over SA will remain dominant as it slowly moves east and into the Tasman Sea on Friday. A cold front will moves across the Bight on Saturday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mouth Flat Beach Temperature Statistics View More

May Temperature

Cape Willoughby (17km)

  • Lowest 3 May, 2026

    11.5 °C

  • Average May

    15.9 °C

  • Highest 1 May, 2026

    24.4 °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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