Southern Harbour Weather Forecast

    • 10
    • 18

    Possible shower

    • 8
    • 20

    Mostly sunny

    • 10
    • 21

    Partly cloudy

    • 12
    • 22

    Mostly sunny

    • 14
    • 21

    Showers increasing

    • 10
    • 18

    Partly cloudy

    • 11
    • 18

    Cloudy

Today 27 Aug Perth

Cloudy. Medium chance of showers, becoming less likely in the late afternoon and evening. Winds southerly 20 to 30 km/h turning southeasterly 15 to 20 km/h in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 15 to 25 knots, reaching up to 30 knots during the morning. Winds tending southeasterly 15 to 20 knots in the evening.
Seas
1.5 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly 2 to 3 metres.
Weather
Partly cloudy.
Weather Situation
A slow-moving cold front over southwest WA will weaken and combine with a trough over the Goldfields today, as a ridge begins to extend south of the state. The ridge will slowly move east on Friday and Saturday with a weak west coast trough developing from Saturday afternoon.
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  • 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

    15.1 °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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