Southern Harbour Weather Forecast

    • 19
    • 27

    Sunny

    • 15
    • 23

    Showers increasing

    • 14
    • 19

    Showers easing. Wind easing

    • 13
    • 20

    Cloudy

    • 13
    • 21

    Mostly sunny

    • 14
    • 20

    Shower or two

    • 12
    • 21

    Partly cloudy

Today 17 Sep Perth

Mostly sunny. Slight chance of a shower in the northeast this afternoon. Winds northeasterly 15 to 25 km/h shifting west to northwesterly in the middle of the day then becoming light in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
North to northeasterly 10 to 15 knots turning northwesterly in the late morning.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres.
Weather
Mostly sunny.
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

Southern Harbour Temperature Statistics View More

September Temperature

Garden Island (12km)

  • Lowest 1 September, 2026

    10.2 °C

  • Average September

    16.4 °C

  • Highest 15 September, 2026

    25.2 °C

Climate (2021–2026)

Garden Island (12km)

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  • Average Low 2021–2026

    15.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    23.3 °C
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