South West Island Weather Forecast

    • 19
    • 32

    Clear

    • 19
    • 33

    Sunny

    • 21
    • 35

    Partly cloudy

    • 22
    • 34

    Partly cloudy

    • 20
    • 34

    Sunny

    • 18
    • 34

    Sunny

    • 19
    • 32

    Partly cloudy

Today 18 Sep Kakadu National Park

Partly cloudy. The chance of fog north of Arnhem Highway early this morning. Light winds becoming east to northeasterly 15 to 20 km/h in the early afternoon then tending northwest to northeasterly in the evening.

Roper Groote Coast

Cape Arnhem to QLD-NT Border
Wind
East to southeasterly about 10 knots, reaching up to 20 knots north of Numbulwar during the morning.
Seas
Around 1 metre.
1st Swell
Northeast to southeasterly below 1 metre.
Weather
Mostly sunny.
Weather Situation
A ridge extending over much of Australia brings fresh east to southeasterly winds over the eastern and northern coastal waters today and Friday, easing over the weekend. Light winds persist over the western waters, easing over the weekend before the next dry southeast surge arrives in Gulf waters Monday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

South West Island Temperature Statistics View More

September Temperature

Centre Island (16km)

  • Lowest 3 September, 2025

    19.3 °C

  • Average September

    24.9 °C

  • Highest 6 September, 2025

    31.7 °C

Climate (2020–Present)

Centre Island (16km)

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  • Average Low 2020–2025

    24.5 °C

  • Average 2020–2025

    27.4 °C

  • Average High 2020–2025

    31.6 °C
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