Granite Island Weather Forecast

    • 13
    • 22

    Mostly clear

    • 15
    • 22

    Mostly sunny

    • 15
    • 22

    Mostly sunny

    • 15
    • 21

    Shower or two. Becoming windy

    • 15
    • 22

    Partly cloudy

    • 16
    • 25

    Mostly sunny

    • 16
    • 30

    Partly cloudy

Today 12 Jan Mount Lofty Ranges

Clear. Winds south to southeasterly 25 to 35 km/h.

South Central Coastal Waters

Wind
Southeasterly 15 to 20 knots.
Seas
Around 1 metre, increasing to 1 to 1.5 metres by early evening.
1st Swell
Southwesterly around 1 metre, increasing to 1 to 1.5 metres by early evening.
Weather
Cloudy.
Weather Situation
A high pressure ridge south of SA will persist over the coming days, with a high centre moving to the south of the Bight mid week. The high will continue moving eastwards into the Tasman Sea later in the week.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Granite Island Temperature Statistics View More

January Temperature

Encounter Bay (2km)

  • Lowest 6 January, 2026

    10.1 °C

  • Average January

    20.3 °C

  • Highest 7 January, 2026

    42.1 °C

Climate (2021–Present)

Encounter Bay (2km)

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  • Average Low 2021–2026

    10.4 °C

  • Average 2021–2026

    15.1 °C

  • Average High 2021–2026

    20.6 °C
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