Kwinana Grain Jetty Weather Forecast

    • 22
    • 31

    Becoming windy. Partly cloudy

    • 18
    • 31

    Cloud clearing

    • 19
    • 33

    Sunny

    • 21
    • 34

    Mostly sunny

    • 23
    • 31

    Sunny

    • 20
    • 27

    Partly cloudy

    • 17
    • 27

    Mostly sunny

Today 12 Jan Perth

Slight chance of a shower early this morning. The chance of a thunderstorm early this morning. Sunny afternoon. Winds easterly 20 to 30 km/h shifting southwesterly 25 to 40 km/h in the middle of the day then tending southerly 15 to 25 km/h in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
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
The chance of a thunderstorm early this morning. Sunny afternoon.
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

Kwinana Grain Jetty Temperature Statistics View More

January Temperature

Garden Island (6km)

  • Lowest 11 January, 2026

    16.3 °C

  • Average January

    22.6 °C

  • Highest 1 January, 2026

    31.8 °C

Climate (2021–Present)

Garden Island (6km)

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  • Average Low 2021–2026

    15.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    23.3 °C
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