Thomson Bay Weather Forecast

    • 20
    • 27

    Clear

    • 21
    • 27

    Mostly sunny

    • 21
    • 27

    Becoming windy. Sunny

    • 20
    • 27

    Sunny

    • 21
    • 27

    Sunny

    • 20
    • 25

    Becoming windy. Sunny

    • 19
    • 24

    Windy. Sunny

Today 31 Dec Lower West

Clear. Winds southerly 20 to 30 km/h decreasing to 15 to 20 km/h in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 15 to 20 knots.
Seas
Around 1 metre.
1st Swell
Southwesterly below 1 metre.
Weather
Clear.
Weather Situation
A ridge sits along the south coast, driving a southeasterly flow with afternoon sea breezes. A trough along the west coast moves inland on Thursday, with another ridge developing along the south in its wake, pushing southerly winds over the local waters.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Thomson Bay Temperature Statistics View More

December Temperature

Rottnest Island (4km)

  • Lowest 21 December, 2025

    14.6 °C

  • Average December

    21.5 °C

  • Highest 25 December, 2025

    40.9 °C

Climate (2020–Present)

Rottnest Island (4km)

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  • Average Low 2020–2025

    16.1 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    22.8 °C
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