Southern Harbour Weather Forecast

    • 14
    • 21

    Showers increasing

    • 10
    • 18

    Partly cloudy

    • 11
    • 19

    Shower or two

    • 11
    • 20

    Showers

    • 13
    • 19

    Showers easing

    • 12
    • 20

    Showers

    • 10
    • 19

    Possible shower

Today 31 Aug Perth

Cloudy. High chance of showers. Winds northwesterly 15 to 25 km/h tending westerly 20 to 30 km/h in the middle of the day then turning south to southwesterly 15 to 25 km/h in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Northwesterly 10 to 15 knots shifting southerly 15 to 25 knots in the evening.
Seas
Around 1 metre.
1st Swell
West to southwesterly 1.5 to 2 metres.
Weather
Partly cloudy. 80% chance of showers.
Weather Situation
A broad trough near the west coast will move east on Monday ahead of a weak cold front moving over the area Monday night. A weak ridge will then extend over local waters in wake of the cold front. Another weak cold front will brush past in the middle of the week.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Southern Harbour Temperature Statistics View More

August Temperature

Garden Island (12km)

  • Lowest 11 August, 2026

    7.7 °C

  • Average August

    15 °C

  • Highest 16 August, 2026

    23.7 °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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