Thomson Bay Weather Forecast

    • 14
    • 19

    Shower or two

    • 14
    • 18

    Shower or two

    • 14
    • 19

    Showers easing

    • 12
    • 18

    Cloud clearing

    • 13
    • 19

    Sunny

    • 14
    • 19

    Sunny

    • 15
    • 19

    Partly cloudy

Today 28 Sep Lower West

Partly cloudy. High chance of showers, becoming less likely in the late afternoon and evening. The chance of a thunderstorm in the south in the early afternoon. Winds northwesterly 15 to 25 km/h turning southwesterly in the early afternoon. Daytime maximum temperatures between 19 and 22.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
West to northwesterly 10 to 15 knots turning south to southwesterly 15 to 20 knots in the early afternoon.
Seas
Below 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly 1 to 1.5 metres.
Weather
Partly cloudy. 70% chance of showers.
Weather Situation
A trough and low are deepening over the South West Land Division. The low will slip to the south of the state and the trough will move over south east parts of the state later today. A cold front will approach on Tuesday and move through during Wednesday. A ridge will lie over the area on Thursday,
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 9 September, 2026

    11.5 °C

  • Average September

    16.5 °C

  • Highest 16 September, 2026

    27.8 °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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