Granite Island Weather Forecast

    • 10
    • 19

    Showers increasing

    • 10
    • 17

    Showers easing

    • 8
    • 18

    Partly cloudy

    • 7
    • 17

    Possible shower

    • 7
    • 17

    Possible shower

    • 5
    • 17

    Partly cloudy

    • 7
    • 18

    Shower or two

Today 18 Aug Mount Lofty Ranges

Partly cloudy. Very high chance of showers, most likely in the evening. Winds northeasterly 15 to 25 km/h turning northerly 20 to 30 km/h during the day. Overnight temperatures falling to around 11 with daytime temperatures reaching between 15 and 18.

South Central Coastal Waters

Wind
Northeasterly 15 to 20 knots turning northerly 20 to 25 knots during the day. Winds reaching up to 30 knots west of Kangaroo Island in the late evening.
Seas
1 to 2 metres.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Partly cloudy. 95% chance of showers. The chance of a thunderstorm in the evening.
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  • 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

    11.7 °C

  • Highest 7 August, 2026

    19.7 °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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