Third Rocks Weather Forecast

    • 11
    • 20

    Sunny day. Showers developing

    • 14
    • 18

    Showers easing

    • 12
    • 18

    Partly cloudy

    • 9
    • 19

    Shower or two

    • 12
    • 17

    Showers

    • 12
    • 15

    Showers easing

    • 10
    • 17

    Showers

Today 3 Aug Perth

Sunny day. High chance of showers, most likely in the evening. The chance of a thunderstorm near the coast in the late afternoon and evening. Winds northeasterly 15 to 20 km/h turning northwesterly in the middle of the day.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
North to northeasterly 10 to 15 knots turning northwesterly 15 to 20 knots in the afternoon.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon.
Weather
Mostly sunny. 90% chance of showers. The chance of a thunderstorm in the late afternoon and evening.
Weather Situation
A trough will approach today, before moving east on Tuesday, followed by a cold front along the southwest coast. A weak ridge will briefly return on Wednesday, before weakening on Thursday ahead of the next cold front.
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

    12.7 °C

  • Highest 1 August, 2026

    16.2 °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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