Thomson Bay Weather Forecast

    • 19
    • 26

    Partly cloudy

    • 18
    • 25

    Partly cloudy

    • 18
    • 24

    Partly cloudy

    • 17
    • 23

    Partly cloudy

    • 18
    • 22

    Partly cloudy

    • 16
    • 21

    Becoming windy. Partly cloudy

    • 15
    • 21

    Wind easing. Mostly sunny

Today 18 Nov Lower West

Partly cloudy. Slight chance of a shower. The chance of a thunderstorm in the afternoon and early evening, possibly severe in the north with damaging winds, large hail and heavy rain which may lead to flash flooding. Winds northeast to southeasterly 15 to 25 km/h. Daytime maximum temperatures in the low to mid 30s.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southeasterly about 10 knots.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres.
Weather
Partly cloudy. The chance of a thunderstorm.
Weather Situation
A ridge over the local waters is weakening today as a trough located offshore is deepening associated with a low pressure system. The trough and low pressure system will move across the west coast later Wednesday and further inland on Thursday, lingering to the east into the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Thomson Bay Temperature Statistics View More

November Temperature

Rottnest Island (4km)

  • Lowest 2 November, 2025

    11.9 °C

  • Average November

    18.9 °C

  • Highest 11 November, 2025

    31.5 °C

Climate (2020–Present)

Rottnest Island (4km)

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  • Average Low 2020–2025

    16 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    22.8 °C
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