Sleaford Islands Weather Forecast

    • 15
    • 22

    Cloudy

    • 12
    • 22

    Shower or two developing

    • 13
    • 22

    Shower or two

    • 12
    • 22

    Cloudy

    • 13
    • 21

    Partly cloudy

    • 12
    • 21

    Cloudy

    • 13
    • 23

    Partly cloudy

Today 19 Dec Port Lincoln

Cloudy. Winds southwesterly 15 to 25 km/h turning southerly 25 to 35 km/h in the middle of the day then decreasing to 15 to 20 km/h in the late evening.

Central Coastal Waters

Wind
Southerly 15 to 20 knots, reaching up to 25 knots inshore in the late afternoon.
Seas
1 to 1.5 metres, increasing to 1 to 2 metres inshore during the morning.
1st Swell
Southwesterly around 1 metre, increasing to 1 to 1.5 metres during the morning, then increasing to 1.5 to 2 metres during the afternoon.
Weather
Cloudy. The chance of a thunderstorm in the west this morning.
Weather Situation
A trough of broad low pressure lies in the west. This area of low pressure is expected to slowly extend across the state from the west during today and tomorrow, before contracting to the far northeast on Sunday evening. Behind this, a ridge of high pressure moves over the west and south during Sunday, persisting throughout SA by late Monday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Sleaford Islands Temperature Statistics View More

December Temperature

Port Lincoln Airport (38km)

  • Lowest 7 December, 2025

    8.1 °C

  • Average December

    18.8 °C

  • Highest 3 December, 2025

    35.3 °C

Climate (2020–Present)

Port Lincoln Airport (38km)

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  • Average Low 2020–2025

    11.4 °C

  • Average 2020–2025

    15.7 °C

  • Average High 2020–2025

    21.3 °C
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