American Beach Weather Forecast

    • 15
    • 21

    Partly cloudy

    • 11
    • 14

    Cloudy

    • 8
    • 16

    Sunny

    • 10
    • 20

    Partly cloudy

    • 13
    • 23

    Cloudy

    • 14
    • 23

    Partly cloudy

    • 13
    • 20

    Partly cloudy

Today 20 Sep Kangaroo Island

Mostly sunny morning. Medium chance of showers in the afternoon and evening. Winds northerly 25 to 40 km/h shifting southwesterly 20 to 30 km/h in the evening. Overnight temperatures falling to around 14 with daytime temperatures reaching around 20.

Investigator Strait Coastal Waters

Wind
Northerly 15 to 25 knots, reaching up to 30 knots through the Backstairs Passage early in the morning. Winds shifting southwesterly 15 to 20 knots in the evening.
Seas
1 to 2 metres.
1st Swell
West to southwesterly around 1 metre.
Weather
Becoming cloudy.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

American Beach Temperature Statistics View More

September Temperature

Cape Willoughby (24km)

  • Lowest 2 September, 2026

    9.9 °C

  • Average September

    13.6 °C

  • Highest 12 September, 2026

    20.3 °C

Climate (2021–2026)

Cape Willoughby (24km)

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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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