Swan River - Heirisson Island Weather Forecast

    • 16
    • 29

    Possible shower

    • 19
    • 28

    Sunny

    • 15
    • 23

    Showers increasing

    • 12
    • 19

    Showers easing

    • 11
    • 22

    Partly cloudy

    • 11
    • 24

    Sunny

    • 14
    • 21

    Shower or two

Today 16 Sep Perth

Partly cloudy. Medium chance of showers, most likely during this afternoon and evening. The chance of a thunderstorm during this afternoon and early evening. Winds east to northeasterly 20 to 30 km/h becoming light in the late afternoon then becoming east to northeasterly 15 to 20 km/h in the evening.

Melville Waters

Wind
East to northeasterly 10 to 15 knots decreasing to below 10 knots in the early afternoon.
Weather
Partly cloudy. The chance of a thunderstorm during this afternoon and early evening.
Weather Situation
A trough extends down the west coast. From Thursday, the trough will become mobile and move inland, ahead of a cold front crossing the local waters on Friday before the next ridge begins to develop.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Swan River - Heirisson Island Temperature Statistics View More

September Temperature

Perth Metro (5km)

  • Lowest 1 September, 2026

    8.3 °C

  • Average September

    16 °C

  • Highest 11 September, 2026

    27.4 °C

Climate (2021–2026)

Perth Metro (5km)

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  • Average Low 2021–2026

    13.4 °C

  • Average 2021–2026

    18.8 °C

  • Average High 2021–2026

    25.4 °C
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