Kwinana Grain Jetty Weather Forecast

    • 16
    • 31

    Sunny

    • 18
    • 31

    Sunny

    • 17
    • 28

    Mostly sunny

    • 14
    • 27

    Sunny

    • 16
    • 30

    Sunny

    • 18
    • 33

    Sunny

    • 20
    • 35

    Sunny

Today 18 Dec Perth

Mostly clear. The chance of smoke haze in the morning. Winds southeasterly 20 to 30 km/h increasing to 25 to 40 km/h in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southeasterly 15 to 25 knots tending southeast to southwesterly in the morning then becoming southeasterly 15 to 20 knots in the late evening. Winds reaching up to 30 knots in the evening.
Seas
1 to 2 metres, decreasing to 1 metre during the morning, then increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly 1 to 1.5 metres, decreasing to around 1 metre during the morning.
Weather
Sunny.
Weather Situation
A ridge extends across the southwest coast today. A west coast trough will form on Friday and move inland during the day, ahead of a new ridge developing on Saturday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Kwinana Grain Jetty Temperature Statistics View More

December Temperature

Garden Island (6km)

  • Lowest 4 December, 2025

    16.4 °C

  • Average December

    22.1 °C

  • Highest 14 December, 2025

    38.8 °C

Climate (2020–Present)

Garden Island (6km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    15.2 °C

  • Average 2020–2025

    19 °C

  • Average High 2020–2025

    23.4 °C
Get WillyWeather+ to remove ads