Slope Island Weather Forecast

    • 21
    • 29

    Becoming windy. Sunny

    • 22
    • 31

    Becoming windy. Sunny

    • 23
    • 35

    Sunny

    • 25
    • 35

    Sunny

    • 24
    • 32

    Sunny

    • 23
    • 26

    Partly cloudy

    • 22
    • 25

    Becoming windy. Partly cloudy

Today 21 Dec Gascoyne

Mostly sunny. The chance of a thunderstorm in the far northeast in the afternoon and early evening. Winds east to southeasterly 25 to 40 km/h. Daytime maximum temperatures 32 to 43.

Gascoyne Coastal Waters

Cape Cuvier to Kalbarri
Wind
Southerly 15 to 25 knots, reaching up to 30 knots during the afternoon and evening.
Seas
1.5 to 2.5 metres.
1st Swell
Southerly 1.5 to 2.5 metres.
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

Slope Island Temperature Statistics View More

December Temperature

Shark Bay Airport (27km)

  • Lowest 6 December, 2025

    18.1 °C

  • Average December

    25 °C

  • Highest 1 December, 2025

    38.9 °C

Climate (2020–Present)

Shark Bay Airport (27km)

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  • Average Low 2020–2025

    16.8 °C

  • Average 2020–2025

    22.3 °C

  • Average High 2020–2025

    29.6 °C
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