Granite Island Weather Forecast

    • 5
    • 18

    Mostly sunny

    • 7
    • 20

    Mostly sunny

    • 9
    • 16

    Partly cloudy

    • 8
    • 16

    Mostly sunny

    • 5
    • 20

    Mostly sunny

    • 10
    • 21

    Shower or two

    • 9
    • 17

    Possible shower

Today 27 Aug Mount Lofty Ranges

Mostly sunny. Light winds becoming northwesterly 15 to 20 km/h in the morning then becoming light in the late afternoon. Daytime maximum temperatures between 15 and 18.

South Central Coastal Waters

Wind
Northerly 10 to 15 knots, reaching up to 20 knots west of Kangaroo Island early in the morning. Winds decreasing to about 10 knots in the late afternoon.
Seas
Around 1 metre.
1st Swell
Southwesterly 2 to 2.5 metres, tending westerly 2.5 to 3 metres around midday.
Weather
Cloud clearing.
Weather Situation
A high pressure ridge over central SA will move slowly eastwards during today. A low pressure trough over WA is expected to extend over the far west of SA late Thursday and Friday. A high pressure system will move across waters to the south over the weekend to be centred over southern Victoria late Sunday.
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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

    12.2 °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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