Thomson Bay Weather Forecast

    • 19
    • 26

    Sunny

    • 21
    • 28

    Sunny

    • 19
    • 25

    Becoming windy. Sunny

    • 18
    • 23

    Very windy. Mostly sunny

    • 15
    • 26

    Windy. Mostly sunny

    • 17
    • 25

    Sunny

    • 20
    • 27

    Sunny

Today 18 Feb Lower West

Sunny. Winds easterly 15 to 25 km/h tending southeast to southwesterly in the late afternoon then becoming light in the late evening. Daytime maximum temperatures in the low to high 30s.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Easterly 10 to 15 knots becoming variable below 10 knots in the morning then becoming southerly 15 to 20 knots in the middle of the day.
Seas
Below 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly around 1 metre.
Weather
Sunny.
Weather Situation
A ridge is strengthening over the southwest and will build across southern WA this week. A west coast trough will return today, deepening on Thursday before moving inland later in the day with a cold front passing to the south on Friday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Thomson Bay Temperature Statistics View More

February Temperature

Rottnest Island (4km)

  • Lowest 17 February, 2026

    16 °C

  • Average February

    22.4 °C

  • Highest 2 February, 2026

    39.4 °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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