Third Rocks Weather Forecast

    • 19
    • 31

    Possible shower

    • 20
    • 30

    Possible storm

    • 19
    • 28

    Partly cloudy

    • 17
    • 25

    Partly cloudy

    • 17
    • 23

    Possible shower

    • 16
    • 22

    Possible shower

    • 14
    • 21

    Partly cloudy

Today 18 Nov Perth

Cloudy. Medium chance of showers, becoming less likely in the evening. The chance of a thunderstorm in the morning and afternoon. Winds east to northeasterly 15 to 25 km/h.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Easterly 10 to 15 knots turning south to southeasterly below 10 knots in the morning then becoming east to southeasterly in the evening.
Seas
Below 1 metre.
1st Swell
Southwesterly around 1 metre, increasing to 1 to 1.5 metres around midday.
Weather
Cloudy. The chance of a thunderstorm in the morning and afternoon.
Weather Situation
A ridge over the local waters will gradually weaken today, contracting to the south coast on Wednesday and moving away. Meanwhile, 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.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Third Rocks Temperature Statistics View More

November Temperature

Garden Island (8km)

  • Lowest 2 November, 2025

    11.7 °C

  • Average November

    19.2 °C

  • Highest 11 November, 2025

    32.7 °C

Climate (2020–Present)

Garden Island (8km)

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  • Average Low 2020–2025

    15.1 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    23.3 °C
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