Granite Island Weather Forecast

    • 14
    • 21

    Partly cloudy

    • 14
    • 22

    Cloudy

    • 14
    • 24

    Sunny

    • 14
    • 30

    Partly cloudy

    • 14
    • 21

    Partly cloudy

    • 12
    • 21

    Cloudy

    • 13
    • 20

    Cloudy

Today 9 Dec Mount Lofty Ranges

Cloud clearing. Winds southeasterly 15 to 25 km/h. Daytime maximum temperatures 21 to 31.

South Central Coastal Waters

Wind
Southerly 10 to 15 knots turning southeasterly 15 to 20 knots during the morning.
Seas
Around 1 metre, increasing to 1 to 1.5 metres west of Kangaroo Island by early evening.
1st Swell
Southwesterly 2 to 3 metres.
Weather
Partly cloudy.
Weather Situation
A broad ridge extends over inland parts of the state, another high pressure system develops south of the Bight, strengthening the ridge over the state ahead of a trough of low pressure developing across the far northwest late Tuesday persisting late into the week.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Granite Island Temperature Statistics View More

December Temperature

Encounter Bay (2km)

  • Lowest 3 December, 2025

    6.9 °C

  • Average December

    18.7 °C

  • Highest 4 December, 2025

    33.4 °C

Climate (2020–Present)

Encounter Bay (2km)

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  • Average Low 2020–2025

    10.4 °C

  • Average 2020–2025

    15.1 °C

  • Average High 2020–2025

    20.6 °C
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