Third Rocks Weather Forecast

    • 11
    • 14

    Cloudy

    • 9
    • 16

    Shower or two

    • 13
    • 16

    Showers. Becoming windy

    • 7
    • 16

    Partly cloudy

    • 6
    • 17

    Mostly sunny

    • 7
    • 17

    Cloud clearing

    • 8
    • 19

    Mostly sunny

Today 8 Aug Perth

Partly cloudy. Medium chance of showers in the northwest, slight chance elsewhere. Winds south to southwesterly 15 to 25 km/h becoming light in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 20 to 25 knots, reaching up to 30 knots in the evening.
Seas
2.5 metres.
1st Swell
Southwesterly 3 to 5 metres.
Weather
Cloudy. 50% chance of showers.
Caution
Large and powerful surf conditions during the evening are expected to be hazardous for coastal activities such as swimming, surfing and rock fishing.
Weather Situation
A vigorous and cold southwesterly flow over the area will ease tonight and on Sunday under the influence of a high pressure ridge to the north. 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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