Cooper Reef Weather Forecast

    • 14
    • 27

    Becoming windy. Sunny

    • 16
    • 29

    Windy. Sunny

    • 18
    • 35

    Becoming windy. Sunny

    • 23
    • 39

    Sunny

    • 27
    • 39

    Partly cloudy

    • 21
    • 27

    Partly cloudy

    • 17
    • 25

    Becoming windy. Partly cloudy

Today 21 Dec Lower West

Sunny. Winds east to southeasterly 20 to 30 km/h turning south to southwesterly 25 to 35 km/h in the early afternoon then becoming southerly 15 to 25 km/h in the late evening. Daytime maximum temperatures around 30.

Lancelin Coastal Waters

Jurien Bay to Two Rocks
Wind
Southeasterly 15 to 20 knots turning southerly 20 to 25 knots in the middle of the day. Winds reaching up to 30 knots offshore in the evening.
Seas
1.5 to 2 metres, decreasing below 1.5 metres during the morning, then increasing to 2 metres during the afternoon.
1st Swell
South to southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore.
Weather
Sunny.
Weather Situation
A ridge will develop across much of southern WA on Sunday, while a trough lies across the Interior. A weak front will brush the south coast on Monday, followed by the west coast trough returning by Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cooper Reef Temperature Statistics View More

December Temperature

Jurien Bay (77km)

  • Lowest 4 December, 2025

    13 °C

  • Average December

    24.3 °C

  • Highest 1 December, 2025

    39.6 °C

Climate (2020–Present)

Jurien Bay (77km)

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  • Average Low 2020–2025

    13.8 °C

  • Average 2020–2025

    19.9 °C

  • Average High 2020–2025

    25.9 °C
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