Grantham Island Weather Forecast

    • 15
    • 23

    Partly cloudy

    • 15
    • 23

    Partly cloudy

    • 16
    • 25

    Cloud clearing

    • 16
    • 29

    Partly cloudy

    • 16
    • 25

    Partly cloudy

    • 16
    • 27

    Partly cloudy

    • 17
    • 29

    Mostly sunny

Today 15 Jan Port Lincoln

Partly cloudy. Winds southerly 30 to 40 km/h tending southeasterly 25 to 35 km/h in the evening.

Spencer Gulf Coastal Waters

Wind
Southerly 20 to 30 knots turning southeasterly in the late evening.
Seas
1.5 to 2.5 metres.
1st Swell
South to southwesterly around 1 metre.
Weather
Partly cloudy.
Weather Situation
A ridge of high pressure south of SA will persist over the coming days, with the high centre moving to the southeast, to be south of Tasmania on Friday and to the Tasman Sea later over the weekend. The ridge lingers into Saturday. On Sunday a trough will begin to move in from the west, reaching central districts by the evening and into the northeast early next week.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Grantham Island Temperature Statistics View More

January Temperature

Port Lincoln Airport (19km)

  • Lowest 6 January, 2026

    11.9 °C

  • Average January

    19.9 °C

  • Highest 7 January, 2026

    44.5 °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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