Blanche Harbor Weather Forecast
- 20
- 34
Partly cloudy
- 22
- 40
Becoming windy. Mostly sunny
- 19
- 29
Becoming windy. Partly cloudy
- 16
- 26
Becoming windy. Sunny
- 15
- 26
Becoming windy. Mostly sunny
- 14
- 31
Sunny
- 17
- 37
Sunny
Today 11 Dec Flinders
Partly cloudy. Slight chance of a shower near the coast during the morning and afternoon. Near zero chance of rain elsewhere. The chance of a thunderstorm during the morning and afternoon. Winds easterly 25 to 35 km/h increasing to 40 km/h before turning southeasterly 20 to 30 km/h during the morning and early afternoon. Daytime maximum temperatures 32 to 38.
Spencer Gulf Coastal Waters
- Wind
- East to southeasterly 10 to 15 knots, reaching up to 20 knots south of Cowell to Wallaroo early in the morning. Winds tending south to southeasterly in the evening.
- Seas
- 1 to 1.5 metres, decreasing below 1 metre during the morning.
- 1st Swell
- South to southwesterly below 1 metre, increasing to 1 to 1.5 metres south of Cowell to Wallaroo.
- Weather
- Partly cloudy. The chance of a thunderstorm during the morning and afternoon.
- Weather Situation
- A ridge of high pressure persists over southern SA, before the high centre moves eastwards over the Tasman Sea late today. A trough of low pressure is expected to move eastwards across the SA waters on Friday. Another ridge of high pressure will move over the south during the weekend.
Blanche Harbor Temperature Statistics View More
December Temperature
Port Augusta Airport (20km)
Lowest 2 December, 2025
12.1 °CAverage December
24.2 °CHighest 4 December, 2025
40.2 °C
Climate (2020–Present)
Port Augusta Airport (20km)
Average Low 2020–2025
12.4 °CAverage 2020–2025
18.8 °CAverage High 2020–2025
26.1 °C