Granite Island Weather Forecast
- 7
- 21
Shower or two developing
- 10
- 18
Shower or two. Windy
- 6
- 13
Showers
- 6
- 15
Shower or two. Wind easing
- 6
- 15
Cloudy
- 5
- 16
Partly cloudy
- 3
- 16
Mostly sunny
Today 22 Jun Mount Lofty Ranges
Sunny morning. Medium chance of showers, most likely in the late afternoon and evening. Winds northerly 25 to 35 km/h. Overnight temperatures falling to between 7 and 10 with daytime temperatures reaching between 18 and 21.
South Central Coastal Waters
- Wind
- North to northeasterly 20 to 25 knots tending north to northwesterly 20 to 30 knots during the day. Winds reaching up to 35 knots west of Kangaroo Island in the late evening.
- Seas
- 1 to 2 metres, increasing to 2 to 3 metres during the morning.
- 1st Swell
- Southwesterly 2 to 3 metres, increasing to 2.5 to 4 metres west of Kangaroo Island by early evening.
- Weather
- Partly cloudy. 80% chance of showers. The chance of a thunderstorm from the late morning, possibly severe.
Granite Island Temperature Statistics View More
June Temperature
Encounter Bay (2km)
Lowest 21 June, 2025
1.8 °CAverage June
11 °CHighest 2 June, 2025
20.5 °C
Climate (2020–Present)
Encounter Bay (2km)
Average Low 2020–2025
10.3 °CAverage 2020–2025
15 °CAverage High 2020–2025
20.5 °C