Rocky Bay Weather Forecast

    • 22
    • 27

    Becoming very windy. Sunny

    • 19
    • 26

    Wind easing. Cloud clearing

    • 19
    • 27

    Sunny

    • 21
    • 28

    Mostly sunny

    • 22
    • 26

    Sunny

    • 19
    • 24

    Partly cloudy

    • 17
    • 24

    Becoming windy. Sunny

Today 12 Jan Lower West

The chance of a thunderstorm in the south in the morning. Sunny afternoon. Winds easterly 20 to 30 km/h shifting south to southwesterly 25 to 40 km/h in the late morning. Daytime maximum temperatures 32 to 37.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
East to southeasterly 10 to 15 knots turning south to southwesterly 15 to 25 knots in the morning. Winds reaching up to 30 knots in the evening.
Seas
Below 1 metre, increasing to 1.5 to 2 metres around midday.
1st Swell
Southwesterly below 1 metre.
Weather
Sunny.
Weather Situation
A trough will near the west coast will deepen and move inland today, followed by a new ridge of high pressure developing to the south on Tuesday. The west coast trough will make a quick return from Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Rocky Bay Temperature Statistics View More

January Temperature

Rottnest Island (2km)

  • Lowest 9 January, 2026

    16.5 °C

  • Average January

    21.9 °C

  • Highest 1 January, 2026

    31.2 °C

Climate (2021–Present)

Rottnest Island (2km)

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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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