Williams Island Weather Forecast

    • 17
    • 18

    Partly cloudy

    • 16
    • 18

    Partly cloudy

    • 16
    • 18

    Cloudy

    • 16
    • 18

    Shower

    • 16
    • 17

    Shower

    • 16
    • 17

    Shower

    • 16
    • 17

    Shower

Today 20 May Lower Eyre Peninsula

Partly cloudy. Light winds.

Central Coastal Waters

Wind
West to northwesterly below 10 knots.
Seas
Below 0.5 metres.
1st Swell
Southwesterly 2.5 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system over SA will remain dominant as it slowly moves east and into the Tasman Sea on Friday. A cold front move across across South Australia over the weekend, followed by another high pressure system.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Williams Island Temperature Statistics View More

May Temperature

Neptune Island (36km)

  • Lowest 3 May, 2026

    12.4 °C

  • Average May

    16.5 °C

  • Highest 1 May, 2026

    21.6 °C

Climate (2021–Present)

Neptune Island (36km)

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  • Average Low 2021–2026

    14.3 °C

  • Average 2021–2026

    16.2 °C

  • Average High 2021–2026

    18.8 °C
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