Granite Island Weather Forecast

    • 10
    • 22

    Partly cloudy

    • 11
    • 29

    Mostly sunny

    • 21
    • 31

    Partly cloudy

    • 13
    • 23

    Possible late shower

    • 13
    • 21

    Shower or two

    • 11
    • 21

    Partly cloudy

    • 10
    • 26

    Sunny

Today 2 Dec Mount Lofty Ranges

Partly cloudy. Light winds becoming westerly 15 to 20 km/h in the middle of the day then becoming light in the evening. Daytime maximum temperatures between 19 and 22.

South Central Coastal Waters

Wind
Northwest to southwesterly 10 to 15 knots tending northwesterly in the late afternoon.
Seas
Around 1 metre.
1st Swell
Southwesterly 2.5 to 3 metres, decreasing to 2 metres by early evening.
Weather
Partly cloudy.
Weather Situation
A high pressure system near the WA and SA border extends a ridge over SA. The high pressure system is expected to slowly move over SA during today and be in the Tasman Sea on Wednesday. A low pressure trough will then move across SA during Wednesday and Thursday, followed by another ridge of high pressure.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Granite Island Temperature Statistics View More

December Temperature

Encounter Bay (2km)

  • Lowest 1 December, 2025

    11.5 °C

  • Average December

    13.5 °C

  • Highest

    –

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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