Thomson Bay Weather Forecast

    • 14
    • 24

    Sunny

    • 15
    • 24

    Partly cloudy

    • 17
    • 28

    Sunny

    • 21
    • 27

    Mostly sunny

    • 21
    • 26

    Shower or two

    • 17
    • 26

    Shower or two

    • 16
    • 26

    Partly cloudy

Today 19 Apr Lower West

Mostly sunny. Winds southeasterly 15 to 25 km/h turning easterly 15 to 20 km/h in the late morning and afternoon. Daytime maximum temperatures between 19 and 24.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southeasterly 10 to 15 knots turning easterly in the evening.
Seas
1 to 1.5 metres, decreasing below 1 metre during the morning.
1st Swell
Southwesterly around 1 metre.
Weather
Sunny.
Weather Situation
A new high pressure ridge is developing to the south. This ridge will remain over the area through the weekend as another trough starts to deepen offshore from the west coast by Sunday. The trough moves inland during Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Thomson Bay Temperature Statistics View More

April Temperature

Rottnest Island (4km)

  • Lowest 18 April, 2025

    15 °C

  • Average April

    21.7 °C

  • Highest 11 April, 2025

    28.7 °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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