The Basin Weather Forecast

    • 12
    • 19

    Showers increasing

    • 13
    • 18

    Shower or two

    • 12
    • 18

    Mostly sunny

    • 13
    • 19

    Mostly sunny

    • 15
    • 19

    Showers

    • 12
    • 17

    Shower or two

    • 11
    • 17

    Shower or two

Today 5 Jul Lower West

Partly cloudy. High chance of showers in the south, medium chance elsewhere. The chance of a thunderstorm near the coast during this afternoon and early evening. Winds northeasterly 15 to 20 km/h tending northerly in the middle of the day then becoming light in the early afternoon. Daytime maximum temperatures between 18 and 21.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
North to northeasterly 15 to 20 knots tending north to northwesterly 10 to 15 knots in the middle of the day then becoming variable below 10 knots in the evening.
Seas
1 to 1.5 metres, decreasing below 1 metre during the afternoon.
1st Swell
Southwesterly 1 to 1.5 metres.
Weather
Partly cloudy. 90% chance of showers. The chance of a thunderstorm during this afternoon and early evening.
Weather Situation
A high pressure system south of the Bight extends a ridge over the south coast, directing north to northeasterly winds over the local waters. A cold front will cross the local waters during Sunday evening. A ridge in the Southern Ocean will renew east to southeasterly winds from Monday.
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

    14.4 °C

  • Highest 1 July, 2026

    18 °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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