Perth FAD4 (offshore) Weather Forecast

    • 16
    • 17

    Shower

    • 16
    • 17

    Shower

    • 15
    • 17

    Shower

    • 15
    • 18

    Sunny

    • 17
    • 18

    Sunny

    • 17
    • 18

    Partly cloudy

    • 18
    • 19

    Partly cloudy

Today 29 Sep Lower West

Partly cloudy. High chance of showers in the south, medium chance elsewhere. Light winds becoming westerly 15 to 20 km/h in the middle of the day then becoming light in the evening. Daytime maximum temperatures between 17 and 21.

Perth Coastal Waters

Two Rocks to Dawesville, offshore from Rottnest Island
Wind
Southwesterly about 10 knots tending westerly 15 to 20 knots in the morning.
Seas
Around 1 metre.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Partly cloudy. 70% chance of showers.
Weather Situation
A trough lies over southwest WA with a connected low south of the state. The trough is moving east as a ridge extends over the west coast. A cold front will cross the southwest corner of the state overnight on Tuesday with a ridge then dominating the synoptic pattern for the remainder of the working week.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Perth FAD4 (offshore) Temperature Statistics View More

September Temperature

Rottnest Island (43km)

  • Lowest 9 September, 2026

    11.5 °C

  • Average September

    16.6 °C

  • Highest 16 September, 2026

    27.8 °C

Climate (2021–2026)

Rottnest Island (43km)

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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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