Southern Harbour Weather Forecast

    • 13
    • 20

    Showers

    • 13
    • 19

    Shower or two

    • 14
    • 19

    Showers easing

    • 10
    • 19

    Partly cloudy

    • 10
    • 21

    Sunny

    • 12
    • 22

    Sunny

    • 13
    • 21

    Mostly sunny

Today 28 Sep Perth

Partly cloudy. Very high chance of showers, most likely during the morning and afternoon. Winds north to northwesterly 15 to 20 km/h shifting southwesterly 15 to 25 km/h in the afternoon then becoming south to southwesterly and light in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Northwesterly 10 to 15 knots shifting south to southwesterly 15 to 20 knots in the early afternoon.
Seas
Below 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2 metres around midday.
Weather
Partly cloudy. 80% chance of showers.
Weather Situation
A trough and low are deepening over the South West Land Division. The low will slip to the south of the state and the trough will move over south east parts of the state later today. A cold front will approach on Tuesday and move through during Wednesday. A ridge will lie over the area on Thursday,
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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

    16.6 °C

  • Highest 16 September, 2026

    29.3 °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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