Thomson Bay Weather Forecast

    • 15
    • 20

    Partly cloudy

    • 14
    • 23

    Sunny

    • 17
    • 24

    Sunny

    • 18
    • 23

    Mostly sunny

    • 16
    • 21

    Showers. Wind easing

    • 13
    • 19

    Shower or two

    • 14
    • 20

    Partly cloudy

Today 14 Sep Lower West

Partly cloudy. The chance of fog inland early this morning. Light winds becoming easterly 15 to 20 km/h in the morning then tending southeasterly 20 to 30 km/h in the middle of the day. Daytime maximum temperatures in the low to mid 20s.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
East to southeasterly about 10 knots tending southerly 15 to 20 knots in the early afternoon then tending southeasterly in the evening.
Seas
Below 0.5 metres, increasing to around 1 metre during the afternoon.
1st Swell
West to southwesterly 2 to 2.5 metres.
Weather
Partly cloudy.
Weather Situation
A westerly flow initially before turning easterly during today as a high develops in the Bight. A trough arrives on the west coast on Tuesday. The trough will move back inland later Thursday ahead of another cold front.
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 °C

  • Highest 11 September, 2026

    23.3 °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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