Third Rocks Weather Forecast

    • 19
    • 33

    Sunny

    • 23
    • 32

    Sunny

    • 19
    • 26

    Partly cloudy

    • 15
    • 28

    Sunny

    • 18
    • 33

    Sunny

    • 23
    • 36

    Sunny

    • 23
    • 33

    Sunny

Today 15 Jan Perth

Sunny. Winds easterly 25 to 40 km/h decreasing to 20 to 30 km/h in the morning then turning south to southeasterly in the afternoon.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Easterly 10 to 15 knots turning 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 west coast trough nearby is deepening. The trough will move inland on Friday ahead of a weak cold front brushing past the south coast on Saturday. A new ridge will develop about southwest WA on the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Third Rocks Temperature Statistics View More

January Temperature

Garden Island (8km)

  • Lowest 11 January, 2026

    16.3 °C

  • Average January

    22.6 °C

  • Highest 1 January, 2026

    31.8 °C

Climate (2021–Present)

Garden Island (8km)

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  • Average Low 2021–2026

    15.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    23.3 °C
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