Third Rocks Weather Forecast

    • 9
    • 16

    Shower or two

    • 13
    • 16

    Showers. Becoming windy

    • 6
    • 16

    Partly cloudy

    • 7
    • 17

    Mostly sunny

    • 7
    • 17

    Mostly sunny

    • 7
    • 19

    Mostly sunny

    • 11
    • 20

    Sunny

Today 9 Aug Perth

Partly cloudy. Medium chance of showers, most likely in the late afternoon and evening. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Northeast to southeasterly 10 to 15 knots becoming variable below 10 knots in the morning then becoming westerly 10 to 15 knots in the evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 2.5 to 4 metres, decreasing to 2.5 to 3 metres by early evening.
Weather
Cloudy. 80% chance of showers.
Caution
Large and powerful surf conditions this morning are expected to be hazardous for coastal activities such as swimming, surfing and rock fishing.
Weather Situation
A high pressure ridge to the north maintains a cold southwesterly flow over the area. Another cold front will move over the area on Monday, followed by another ridge on Tuesday and Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Third Rocks Temperature Statistics View More

August Temperature

Garden Island (8km)

  • Lowest 2 August, 2026

    9.2 °C

  • Average August

    15.1 °C

  • Highest 3 August, 2026

    21.2 °C

Climate (2021–2026)

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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