Thomson Bay Weather Forecast

    • 13
    • 18

    Cloudy

    • 14
    • 18

    Showers. Windy

    • 11
    • 17

    Possible late shower

    • 13
    • 19

    Showers. Very windy

    • 11
    • 15

    Showers. Very windy

    • 11
    • 16

    Showers. Wind easing

    • 12
    • 17

    Showers. Windy

Today 17 Jul Lower West

Partly cloudy. Slight chance of a shower in the south, near zero chance elsewhere. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Westerly below 10 knots increasing to 10 to 15 knots in the evening.
Seas
Below 0.5 metres.
1st Swell
Southwesterly 2.5 to 4 metres, decreasing to 2.5 to 3 metres by early evening.
Weather
Partly cloudy.
Weather Situation
A high pressure ridge over the local waters will weaken tonight as a weak cold front passes through the area on Friday. A new ridge will become established on Friday night and Saturday. Winds will strengthen out of the northwest during Sunday as a stronger cold front approaches from the west, tending southwesterly in its wake on Sunday night and Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Thomson Bay Temperature Statistics View More

July Temperature

Rottnest Island (4km)

  • Lowest 8 July, 2025

    11.2 °C

  • Average July

    15.8 °C

  • Highest 6 July, 2025

    21.7 °C

Climate (2020–Present)

Rottnest Island (4km)

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  • Average Low 2020–2025

    16.1 °C

  • Average 2020–2025

    19 °C

  • Average High 2020–2025

    22.8 °C
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