Thomson Bay Weather Forecast

    • 19
    • 23

    Shower or two

    • 18
    • 22

    Possible shower

    • 17
    • 22

    Partly cloudy

    • 17
    • 25

    Sunny

    • 19
    • 25

    Mostly sunny

    • 20
    • 25

    Partly cloudy

    • 20
    • 24

    Partly cloudy

Today 30 Mar Lower West

Partly cloudy. The chance of fog in the north early this morning. Very high chance of showers in the south, medium chance elsewhere. Light winds becoming westerly 25 to 35 km/h in the morning. Daytime maximum temperatures between 19 and 23.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
West to southwesterly about 10 knots increasing to 15 to 20 knots in the morning.
Seas
Below 1 metre, increasing to 1 to 1.5 metres around midday.
1st Swell
Southwesterly around 1 metre, increasing to 1 to 1.5 metres around midday, then tending west to southwesterly 1 to 1.5 metres during the afternoon.
Weather
Partly cloudy. 70% chance of showers.
Weather Situation
A series of cold fronts will move across the south coast, maintaining a showery westerly flow across the local waters until Tuesday. A new ridge will extend over southern WA from later Tuesday, before sinking to the south coast on Thursday as a trough develops over inland South West Land Division and inland Gascoyne.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Thomson Bay Temperature Statistics View More

March Temperature

Rottnest Island (4km)

  • Lowest 11 March, 2026

    15.1 °C

  • Average March

    21.8 °C

  • Highest 18 March, 2026

    36.3 °C

Climate (2021–Present)

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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