Granite Island Weather Forecast

    • 18
    • 26

    Showers

    • 11
    • 18

    Showers

    • 10
    • 19

    Showers

    • 9
    • 18

    Possible shower

    • 7
    • 19

    Shower or two

    • 8
    • 15

    Shower or two

    • 8
    • 17

    Shower or two

Today 2 May Mount Lofty Ranges

Cloudy. Very high chance of showers, most likely in the morning and afternoon. The chance of a thunderstorm in the morning and afternoon. Winds north to northeasterly 25 to 35 km/h turning northwesterly 20 to 30 km/h in the late morning. Overnight temperatures falling to between 16 and 19 with daytime temperatures reaching the low to mid 20s.

South Central Coastal Waters

Wind
Northerly 20 to 30 knots turning northwesterly during the morning.
Seas
1.5 to 2 metres, increasing to 2 to 3 metres during the morning.
1st Swell
Southwesterly 1.5 to 2 metres, increasing to 2 to 3 metres during the afternoon, then tending westerly 3 to 5 metres later in the evening.
Weather
Cloudy. 95% chance of showers.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Granite Island Temperature Statistics View More

May Temperature

Encounter Bay (2km)

  • Lowest 1 May, 2026

    12.9 °C

  • Average May

    23.4 °C

  • Highest

    –

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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