The Basin Weather Forecast

    • 11
    • 17

    Shower or two

    • 13
    • 19

    Rain. Very windy

    • 10
    • 16

    Showers. Wind easing

    • 12
    • 17

    Showers

    • 13
    • 18

    Showers. Windy

    • 9
    • 15

    Showers easing. Wind easing

    • 10
    • 15

    Partly cloudy

Today 19 Jul Lower West

Mostly sunny day. Patches of frost inland early this morning. The chance of morning fog inland. Slight chance of a shower late this afternoon and evening. Light winds. Daytime maximum temperatures between 15 and 18.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Northeasterly 10 to 15 knots turning north to northwesterly in the middle of the day then tending west to northwesterly 15 to 20 knots in the late evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 2 to 3 metres.
Weather
Partly cloudy.
Weather Situation
A ridge located nearby is moving east. A strong cold front will cross the Local Waters later Sunday afternoon or early evening. A new ridge will follow in the wake of the front across central WA early next week, maintaining a westerly flow across the southwest coast.
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 8 July, 2025

    11.2 °C

  • Average July

    15.7 °C

  • Highest 6 July, 2025

    21.7 °C

Climate (2020–Present)

Rottnest Island (3km)

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  • Average Low 2020–2025

    16.1 °C

  • Average 2020–2025

    19 °C

  • Average High 2020–2025

    22.8 °C
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