Thomson Bay Weather Forecast

    • 14
    • 18

    Partly cloudy

    • 12
    • 17

    Partly cloudy

    • 13
    • 19

    Possible shower

    • 15
    • 19

    Possible morning storm. Showers

    • 12
    • 17

    Shower or two

    • 11
    • 18

    Partly cloudy

    • 11
    • 19

    Mostly sunny

Today 23 Aug Lower West

Partly cloudy. Slight chance of a shower in the north, near zero chance elsewhere. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 10 to 15 knots decreasing to about 10 knots in the late evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 to 2 metres.
Weather
Partly cloudy.
Weather Situation
A weak cold front is crossing the southwest corner of the state today. A new ridge will extend across the area on Sunday night, moving east on Tuesday. Another cold front will move across the local waters on Wednesday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Thomson Bay Temperature Statistics View More

August Temperature

Rottnest Island (4km)

  • Lowest 9 August, 2026

    7.4 °C

  • Average August

    15.5 °C

  • Highest 16 August, 2026

    23.2 °C

Climate (2021–2026)

Rottnest Island (4km)

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  • Average Low 2021–2026

    16.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    22.8 °C
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