South Island Weather Forecast

    • 27
    • 29

    Partly cloudy

    • 27
    • 29

    Sunny

    • 28
    • 31

    Partly cloudy

    • 29
    • 34

    Partly cloudy

    • 29
    • 31

    Partly cloudy

    • 28
    • 30

    Partly cloudy

    • 27
    • 31

    Partly cloudy

Today 18 Dec Pilbara

Mostly sunny. Slight chance of a shower near the coast in the afternoon. Near zero chance of rain elsewhere. The chance of a thunderstorm in the southwest in the afternoon and early evening. Winds east to northeasterly 20 to 30 km/h turning north to northwesterly 15 to 25 km/h in the evening. Daytime maximum temperatures 38 to 44.

Pilbara West Coastal Waters

Cape Preston to North West Cape
Wind
Variable about 10 knots becoming northwest to northeasterly 10 to 15 knots in the middle of the day then becoming variable about 10 knots in the late evening.
Seas
Below 1 metre.
1st Swell
West to southwesterly below 1 metre inshore, increasing to 1 to 2 metres offshore west of Barrow Island.
Weather
Sunny.
Weather Situation
A broad area of low pressure will persist and deepen over inland areas in the north this week and during the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

South Island Temperature Statistics View More

December Temperature

Onslow Airport (31km)

  • Lowest 1 December, 2025

    21.7 °C

  • Average December

    29.4 °C

  • Highest 7 December, 2025

    43.5 °C

Climate (2020–Present)

Onslow Airport (31km)

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  • Average Low 2020–2025

    20.5 °C

  • Average 2020–2025

    25.8 °C

  • Average High 2020–2025

    32.8 °C
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