Granite Island Weather Forecast

    • 11
    • 19

    Shower or two

    • 9
    • 18

    Cloudy

    • 8
    • 19

    Showers

    • 8
    • 16

    Shower or two

    • 10
    • 18

    Showers

    • 11
    • 19

    Shower or two

    • 10
    • 19

    Possible shower

Today 4 May Mount Lofty Ranges

Partly cloudy. Medium chance of showers, becoming less likely later this evening. Winds west to southwesterly 20 to 30 km/h decreasing to 15 to 20 km/h in the evening.

South Central Coastal Waters

Wind
Southwesterly 15 to 25 knots.
Seas
1.5 to 2 metres.
1st Swell
Southwesterly 3 metres.
Weather
Partly cloudy.
Weather Situation
A low pressure system in Bass Strait and associated trough will clear eastwards, weakening their influence of SA by Monday evening. A ridge of high pressure will begin to extend from the west on Tuesday and will be briefly be weakened as a cold front crosses the southeast on Wednesday afternoon. The ridge will begin to re-establish in the wake of the front and stabilise over SA with the slow moving high pressure centre sitting south of WA by Friday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Granite Island Temperature Statistics View More

May Temperature

Encounter Bay (2km)

  • Lowest 3 May, 2026

    12.4 °C

  • Average May

    20.5 °C

  • Highest 1 May, 2026

    29.7 °C

Climate (2021–Present)

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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