Cottesloe Beach Weather Forecast

    • 12
    • 19

    Morning shower or two

    • 11
    • 21

    Mostly sunny

    • 12
    • 24

    Sunny

    • 13
    • 26

    Sunny

    • 15
    • 27

    Sunny

    • 15
    • 27

    Sunny

    • 14
    • 25

    Sunny

Today 19 Sep Perth

Partly cloudy. Slight chance of a shower, most likely in the early morning. The chance of fog about the hills in the early morning. Light winds becoming south to southwesterly 15 to 20 km/h in the early afternoon then becoming light in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southwesterly 10 to 15 knots tending south to southeasterly during the day.
Seas
Below 1 metre.
1st Swell
Southwesterly 2 to 3 metres.
Weather
Partly cloudy.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cottesloe Beach Temperature Statistics View More

September Temperature

Swanbourne (4km)

  • Lowest 8 September, 2025

    6.2 °C

  • Average September

    14.3 °C

  • Highest 12 September, 2025

    26 °C

Climate (2020–Present)

Swanbourne (4km)

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  • Average Low 2020–2025

    14.5 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    24.3 °C
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