Granite Island Weather Forecast

    • 7
    • 16

    Cloudy

    • 8
    • 17

    Partly cloudy

    • 5
    • 18

    Partly cloudy

    • 7
    • 18

    Shower or two

    • 8
    • 16

    Shower or two

    • 7
    • 17

    Partly cloudy

    • 7
    • 18

    Shower or two

Today 21 Aug Mount Lofty Ranges

Cloudy. Medium chance of showers. Light winds becoming westerly 15 to 20 km/h in the morning. Overnight temperatures falling to around 8 with daytime temperatures reaching between 13 and 16.

South Central Coastal Waters

Wind
Westerly 15 to 20 knots.
Seas
Around 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly 3 to 4 metres.
Weather
Cloudy. 50% chance of showers.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Granite Island Temperature Statistics View More

August Temperature

Encounter Bay (2km)

  • Lowest 1 August, 2026

    0.5 °C

  • Average August

    12 °C

  • Highest 18 August, 2026

    20.3 °C

Climate (2021–2026)

Encounter Bay (2km)

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  • Average Low 2021–2026

    10.5 °C

  • Average 2021–2026

    15.2 °C

  • Average High 2021–2026

    20.7 °C
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