Granite Island Weather Forecast

    • 9
    • 21

    Mostly sunny

    • 9
    • 25

    Showers developing

    • 13
    • 21

    Partly cloudy

    • 11
    • 26

    Sunny

    • 16
    • 25

    Shower or two

    • 11
    • 19

    Shower or two

    • 11
    • 18

    Possible shower

Today 29 Oct Mount Lofty Ranges

The chance of fog early this morning. Mostly sunny day. Light winds becoming west to northwesterly 15 to 20 km/h in the middle of the day then becoming light in the late afternoon. Daytime maximum temperatures between 19 and 23.

South Central Coastal Waters

Wind
Southeasterly 10 to 15 knots.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system well south of the state will extend a ridge coastal waters until a trough begins to enter in the west early Thursday. This trough and a weak embedded low pressure system will sweep across waters on Thursday with a weak high pressure system developing in the Bight on Friday. This high will move eastwards, making way for cold front moving into the west late Saturday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Granite Island Temperature Statistics View More

October Temperature

Encounter Bay (2km)

  • Lowest 15 October, 2025

    3.4 °C

  • Average October

    16.1 °C

  • Highest 16 October, 2025

    30.4 °C

Climate (2020–Present)

Encounter Bay (2km)

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  • Average Low 2020–2025

    10.4 °C

  • Average 2020–2025

    15.2 °C

  • Average High 2020–2025

    20.7 °C
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