Thomson Bay Weather Forecast

    • 13
    • 17

    Possible shower

    • 13
    • 18

    Partly cloudy

    • 13
    • 19

    Mostly sunny

    • 13
    • 20

    Sunny

    • 14
    • 22

    Sunny

    • 16
    • 22

    Sunny

    • 17
    • 22

    Sunny

Today 18 Sep Lower West

Partly cloudy. The chance of morning fog in the north. Medium chance of showers in the morning and early afternoon. Light winds becoming southwesterly 15 to 25 km/h in the morning then becoming light in the evening. Overnight temperatures falling to between 7 and 11 with daytime temperatures reaching between 16 and 19.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southwesterly 10 to 15 knots.
Seas
Around 1 metre.
1st Swell
West to southwesterly 2 to 3 metres.
Weather
Partly cloudy.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Thomson Bay Temperature Statistics View More

September Temperature

Rottnest Island (4km)

  • Lowest 8 September, 2025

    8.2 °C

  • Average September

    15 °C

  • Highest 12 September, 2025

    22.4 °C

Climate (2020–Present)

Rottnest Island (4km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    16 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    22.8 °C
Get WillyWeather+ to remove ads