Grantham Island Weather Forecast

    • 17
    • 29

    Mostly sunny

    • 17
    • 28

    Shower or two developing

    • 20
    • 25

    Showers

    • 16
    • 23

    Partly cloudy

    • 17
    • 24

    Partly cloudy

    • 17
    • 23

    Partly cloudy

    • 17
    • 24

    Cloudy

Today 20 Feb Port Lincoln

Mostly sunny. Winds east to southeasterly 15 to 20 km/h turning southerly 20 to 30 km/h in the morning then tending southeasterly 20 to 25 km/h in the late evening.

Spencer Gulf Coastal Waters

Wind
East to southeasterly 10 to 15 knots becoming variable about 10 knots in the early morning then becoming south to southwesterly 15 to 20 knots in the middle of the day.
Seas
Around 1 metre, increasing to 1 to 1.5 metres by early evening.
1st Swell
South to southwesterly around 1 metre, increasing to 1 to 2 metres south of Cowell to Wallaroo.
Weather
Mostly sunny.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Grantham Island Temperature Statistics View More

February Temperature

Port Lincoln Airport (19km)

  • Lowest 4 February, 2026

    10.6 °C

  • Average February

    20.1 °C

  • Highest 16 February, 2026

    34.5 °C

Climate (2021–Present)

Port Lincoln Airport (19km)

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  • Average Low 2021–2026

    11.4 °C

  • Average 2021–2026

    15.8 °C

  • Average High 2021–2026

    21.3 °C
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