Granite Island Weather Forecast

    • 9
    • 16

    Rain

    • 10
    • 16

    Rain

    • 8
    • 17

    Partly cloudy

    • 5
    • 19

    Sunny

    • 7
    • 20

    Possible shower

    • 8
    • 19

    Partly cloudy

    • 8
    • 18

    Partly cloudy

Today 24 Aug Mount Lofty Ranges

Cloudy. Very high chance of rain. Winds north to northeasterly 15 to 25 km/h. Overnight temperatures falling to around 10 with daytime temperatures reaching between 12 and 15.

South Central Coastal Waters

Wind
North to northeasterly 10 to 15 knots shifting south to southeasterly 15 to 20 knots in the afternoon.
Seas
Around 1 metre, increasing to 1 to 1.5 metres west of Kangaroo Island during the afternoon.
1st Swell
Southwesterly 2 to 3 metres, decreasing to 2 metres by early evening.
Weather
Cloudy. Near 100% chance of rain.
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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