Granite Island Weather Forecast

    • 15
    • 22

    Rain. Becoming windy

    • 11
    • 20

    Partly cloudy

    • 9
    • 27

    Shower or two developing

    • 11
    • 17

    Possible shower

    • 9
    • 15

    Shower or two

    • 8
    • 15

    Cloudy

    • 7
    • 16

    Partly cloudy

Today 9 Oct Mount Lofty Ranges

Cloudy. Very high chance of showers, most likely during the morning and afternoon. The chance of a thunderstorm during this afternoon and evening, possibly severe with damaging winds, large hail and heavy rain which may lead to flash flooding. Winds north to northwesterly 20 to 30 km/h increasing to 25 to 40 km/h in the morning then turning westerly 25 to 35 km/h in the evening. Daytime maximum temperatures between 18 and 22.

South Central Coastal Waters

Wind
Northerly 15 to 25 knots turning westerly in the late morning and early afternoon. Winds reaching up to 30 knots during the afternoon and evening.
Seas
1.5 to 2.5 metres.
1st Swell
Southwesterly 2.5 metres.
Weather
Cloudy. 95% chance of showers. The chance of a thunderstorm.
Weather Situation
A trough and cold front over western SA will track eastwards across the rest of SA on Friday before a weak high briefly establishes in the north on Saturday. Another series of troughs and cold fronts are expected to enter western SA early on Sunday, crossing the state then clearing in the east by the end of Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Granite Island Temperature Statistics View More

October Temperature

Encounter Bay (2 km)

  • Lowest 8 October, 2026

    6.5 °C

  • Average October

    14.2 °C

  • Highest 7 October, 2026

    20.9 °C

Climate (2021–2026)

Encounter Bay (2 km)

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  • Average Low 2021–2026

    10.5 °C

  • Average 2021–2026

    15.3 °C

  • Average High 2021–2026

    20.7 °C
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