Sandy Island Weather Forecast

    • 15
    • 20

    Wind easing. Cloudy

    • 13
    • 21

    Cloudy

    • 15
    • 22

    Cloudy

    • 13
    • 24

    Becoming windy. Partly cloudy

    • 13
    • 28

    Windy. Sunny

    • 19
    • 33

    Sunny

    • 18
    • 26

    Cloudy

Today 20 Dec South West

Partly cloudy. Slight chance of a shower in the southwest early this morning. Near zero chance of rain elsewhere. Winds south to southwesterly 15 to 25 km/h tending south to southeasterly 20 to 30 km/h during the day. Daytime maximum temperatures between 19 and 25.

Leeuwin Coastal Waters

Cape Naturaliste to Walpole
Wind
South to southwesterly 20 to 25 knots, reaching up to 30 knots early in the morning. Winds tending south to southeasterly 15 to 20 knots during the morning and early afternoon.
Seas
1.5 to 2.5 metres.
1st Swell
Southwesterly 1 to 2 metres, increasing to 2 to 3 metres during the morning.
Weather
Cloudy.
Weather Situation
A west coast trough will move to the Goldfields and inland Gascoyne today as a weak front brushes past the south coast. A ridge will then develop across much of southern WA on Sunday, pushing the trough further north. Another 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

Sandy Island Temperature Statistics View More

December Temperature

Windy Harbour (3km)

  • Lowest 13 December, 2025

    0.8 °C

  • Average December

    20.9 °C

  • Highest 15 December, 2025

    33.2 °C

Climate (2020–Present)

Windy Harbour (3km)

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  • Average Low 2020–2025

    11.2 °C

  • Average 2020–2025

    17 °C

  • Average High 2020–2025

    20.5 °C
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