The Basin Weather Forecast

    • 13
    • 21

    Sunny

    • 16
    • 20

    Showers. Possible afternoon storm

    • 15
    • 19

    Showers

    • 14
    • 18

    Showers easing. Wind easing

    • 13
    • 17

    Showers

    • 12
    • 17

    Possible shower

    • 12
    • 18

    Possible shower

Today 15 Jul Lower West

Sunny. Winds northeasterly 20 to 30 km/h turning northerly 15 to 25 km/h in the middle of the day. Daytime maximum temperatures in the low to mid 20s.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Northerly 10 to 15 knots.
Seas
1 to 1.5 metres, decreasing below 1 metre during the afternoon.
1st Swell
Southwesterly 1.5 to 2 metres.
Weather
Sunny.
Weather Situation
A ridge over southern parts of the state will be pushed northwards as a cold front moves over the Perth local waters Thursday afternoon, followed by a second cold front later Friday and into Saturday. A weak ridge will begin to develop north of the local waters over the central west cost on Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

The Basin Temperature Statistics View More

July Temperature

Rottnest Island (3km)

  • Lowest 1 July, 2026

    9.9 °C

  • Average July

    15.2 °C

  • Highest 9 July, 2026

    20.7 °C

Climate (2021–2026)

Rottnest Island (3km)

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  • Average Low 2021–2026

    16.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    22.8 °C
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