American River Weather Forecast
- 14
- 20
Partly cloudy
- 12
- 20
Cloudy
- 13
- 19
Partly cloudy
- 12
- 20
Cloudy
- 13
- 18
Cloudy
- 13
- 21
Mostly sunny
- 14
- 30
Sunny
Today 21 Dec Kangaroo Island
Cloudy. Winds southerly 25 to 35 km/h decreasing to 15 to 20 km/h in the late evening.
Investigator Strait Coastal Waters
- Wind
- Southwesterly 20 to 25 knots tending southerly 15 to 25 knots in the late afternoon.
- Seas
- 1.5 to 2 metres, decreasing below 1.5 metres later in the evening.
- 1st Swell
- West to southwesterly below 1 metre, increasing to 1 to 1.5 metres by early evening.
- Weather
- Partly cloudy.
- Weather Situation
- A broad trough of low pressure lies over the far northeast as a ridge of high pressure ridge builds over the west and south of the State during Sunday evening. The high pressure ridge extends across the entire State and Coastal Waters by early Monday and persists until Thursday.
American River Temperature Statistics View More
December Temperature
Kingscote Airport (24km)
Lowest 7 December, 2025
3.8 °CAverage December
18 °CHighest 18 December, 2025
41 °C
Climate (2020–Present)
Kingscote Airport (24km)
Average Low 2020–2025
9.2 °CAverage 2020–2025
14.7 °CAverage High 2020–2025
21.1 °C