Sleaford Islands Weather Forecast

    • 14
    • 22

    Possible shower. Wind easing

    • 10
    • 16

    Cloudy

    • 9
    • 19

    Sunny

    • 11
    • 24

    Mostly sunny

    • 15
    • 28

    Cloudy

    • 14
    • 25

    Partly cloudy

    • 13
    • 22

    Partly cloudy

Today 20 Sep Port Lincoln

Becoming partly cloudy. Medium chance of showers late this afternoon and evening. Winds north to northwesterly 35 to 45 km/h tending northwest to southwesterly 25 to 35 km/h in the early morning then becoming southwesterly 15 to 25 km/h in the evening.

Central Coastal Waters

Wind
North to northwesterly 20 to 25 knots, reaching up to 30 knots early in the morning. Winds shifting southwesterly in the late afternoon.
Seas
1.5 to 2 metres.
1st Swell
Southwesterly 1.5 to 2 metres, increasing to 2 to 3 metres by early evening.
Weather
Becoming cloudy.
Weather Situation
A cold front will cross the west of the state this morning and will track across the east of the state during the day. Another high pressure system will move eastwards across waters to the south during Monday then over Victoria and the Tasman Sea on Tuesday. This high will extend a ridge westwards over SA ahead of a low pressure trough that is expected to move over the far west of SA during Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Sleaford Islands Temperature Statistics View More

September Temperature

Port Lincoln Airport (38km)

  • Lowest 18 September, 2026

    3.3 °C

  • Average September

    13.8 °C

  • Highest 4 September, 2026

    25.1 °C

Climate (2021–2026)

Port Lincoln Airport (38km)

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  • Average Low 2021–2026

    11.5 °C

  • Average 2021–2026

    15.8 °C

  • Average High 2021–2026

    21.3 °C
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