Grantham Island Weather Forecast

    • 14
    • 23

    Clear

    • 16
    • 31

    Sunny

    • 17
    • 23

    Partly cloudy

    • 16
    • 21

    Cloudy

    • 15
    • 21

    Partly cloudy

    • 16
    • 25

    Partly cloudy

    • 17
    • 26

    Shower or two

Today 9 Mar Port Lincoln

Sunny. Winds southeasterly 15 to 25 km/h becoming light in the late evening.

Spencer Gulf Coastal Waters

Wind
South to southeasterly 10 to 15 knots tending south to southwesterly 15 to 20 knots in the middle of the day then tending south to southeasterly in the evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres north of Cowell to Wallaroo during the afternoon.
1st Swell
South to southwesterly below 1 metre, increasing to 1 to 1.5 metres south of Cowell to Wallaroo.
Weather
Mostly sunny.
Weather Situation
A ridge of high pressure lies to the south of SA. The ridge will strengthen as another high develops over waters south of the Bight. This second high will move eastwards today and early next week ahead of a cold front expected to move across mid next week.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Grantham Island Temperature Statistics View More

March Temperature

Port Lincoln Airport (19km)

  • Lowest 5 March, 2026

    11.6 °C

  • Average March

    18.7 °C

  • Highest 1 March, 2026

    25.5 °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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