Seal Island Weather Forecast

    • 11
    • 18

    Shower or two

    • 9
    • 17

    Partly cloudy

    • 12
    • 19

    Shower or two

    • 15
    • 18

    Showers

    • 12
    • 17

    Shower or two

    • 9
    • 19

    Partly cloudy

    • 10
    • 21

    Mostly sunny

Today 23 Aug Perth

Partly cloudy. Medium chance of showers, most likely in the afternoon and early evening. Light winds becoming southwesterly 15 to 20 km/h in the early afternoon then becoming light in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southeasterly 10 to 15 knots turning southwesterly in the middle of the day then tending southerly in the evening.
Seas
Around 1 metre, decreasing below 0.5 metres around midday, then increasing to below 1 metre during the afternoon.
1st Swell
Southwesterly 1 to 2 metres.
Weather
Partly cloudy. 60% chance of showers.
Weather Situation
A weak cold front will cross the southwest corner of the state early Sunday, ahead of a ridge extending across the area on Sunday and Monday. Another cold front will move over the far southwest of the state on Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Seal Island Temperature Statistics View More

August Temperature

Garden Island (5km)

  • Lowest 11 August, 2026

    7.7 °C

  • Average August

    14.9 °C

  • Highest 16 August, 2026

    23.7 °C

Climate (2021–2026)

Garden Island (5km)

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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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