Southern Harbour Weather Forecast

    • 10
    • 18

    Shower or two clearing

    • 8
    • 17

    Partly cloudy

    • 8
    • 18

    Sunny

    • 8
    • 19

    Sunny

    • 9
    • 20

    Possible shower developing

    • 11
    • 20

    Shower or two

    • 10
    • 19

    Possible shower

Today 21 Jul Perth

Partly cloudy. The chance of morning fog about the hills. Medium chance of showers, most likely during the morning and afternoon. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Variable about 10 knots becoming south to southeasterly 10 to 15 knots in the middle of the day.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 2 metres.
Weather
Partly cloudy. 70% chance of showers.
Weather Situation
A ridge is strengthening over the west coast with a weak cold front moving east along the south coast today. The ridge will then move south and strengthen in the wake of the cold front.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Southern Harbour Temperature Statistics View More

July Temperature

Garden Island (12km)

  • Lowest 8 July, 2026

    7 °C

  • Average July

    14.9 °C

  • Highest 15 July, 2026

    22.8 °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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