Granite Island Weather Forecast

    • 12
    • 21

    Cloudy

    • 13
    • 19

    Cloudy

    • 11
    • 21

    Cloud clearing

    • 13
    • 28

    Mostly sunny

    • 14
    • 33

    Sunny

    • 17
    • 32

    Mostly sunny

    • 18
    • 30

    Partly cloudy

Today 24 Dec Mount Lofty Ranges

Partly cloudy. Slight chance of a shower about the southern Fleurieu Peninsula, near zero chance elsewhere. Winds south to southwesterly 15 to 25 km/h tending south to southeasterly 20 to 30 km/h during the afternoon and evening. Daytime maximum temperatures between 19 and 24.

South Central Coastal Waters

Wind
South to southwesterly 15 to 20 knots tending south to southeasterly in the evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres by early evening.
1st Swell
Southwesterly 3 to 4 metres.
Weather
Cloudy.
Weather Situation
A ridge of high pressure persists across South Australia this week as the high centre moves to the south of the Bight on Thursday, continuing eastwards on Friday, to be in the Tasman Sea on Saturday. A trough embedded in the southwesterly flow around the ridge clips the southeast this morning.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Granite Island Temperature Statistics View More

December Temperature

Encounter Bay (2km)

  • Lowest 3 December, 2025

    6.9 °C

  • Average December

    18.3 °C

  • Highest 18 December, 2025

    40.7 °C

Climate (2020–Present)

Encounter Bay (2km)

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  • Average Low 2020–2025

    10.4 °C

  • Average 2020–2025

    15.1 °C

  • Average High 2020–2025

    20.6 °C
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