Perth FAD1 (offshore) Weather Forecast

    • 24
    • 26

    Sunny

    • 23
    • 24

    Partly cloudy

    • 20
    • 21

    Windy

    • 19
    • 20

    Partly cloudy

    • 20
    • 21

    Cloudy

    • 19
    • 20

    Partly cloudy

    • 18
    • 21

    Windy

Today 21 Jan Perth

Sunny. Winds east to northeasterly 30 to 45 km/h tending south to southeasterly 15 to 20 km/h in the evening then tending easterly 15 to 25 km/h in the late evening. Gusts to 70 kph about the hills and foothills this morning.

Perth Coastal Waters

Two Rocks to Dawesville, offshore from Rottnest Island
Wind
Easterly 15 to 20 knots becoming variable about 10 knots in the middle of the day then becoming southerly 10 to 15 knots in the late afternoon.
Seas
1 to 1.5 metres, decreasing below 1 metre around midday.
1st Swell
Southwesterly 1.5 to 2.5 metres.
Weather
Sunny.
Weather Situation
A deep trough is located offshore, while a firm ridge envelops southern WA. The ridge starts to shift east later today, allowing the trough to move inland across the west coast on Thursday ahead of a weak cold front brushing the south coast on Friday. A weak ridge will form in the southwest before another cold front approaches over the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Perth FAD1 (offshore) Temperature Statistics View More

January Temperature

Rottnest Island (55km)

  • Lowest 18 January, 2026

    15.9 °C

  • Average January

    22.1 °C

  • Highest 1 January, 2026

    31.2 °C

Climate (2021–Present)

Rottnest Island (55km)

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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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