Port Augusta Harbor Weather Forecast
- 19
- 39
Partly cloudy
- 20
- 26
Morning shower or two. Windy
- 14
- 27
Sunny
- 14
- 34
Sunny
- 17
- 36
Sunny
- 19
- 35
Partly cloudy
- 20
- 36
Mostly sunny
Today 5 Dec Flinders
Partly cloudy. Slight chance of a shower near the coast in the evening. Near zero chance of rain elsewhere. Winds northwest to northeasterly 20 to 30 km/h becoming northwesterly 30 to 45 km/h in the morning then shifting south to southwesterly 20 to 30 km/h in the evening. Overnight temperatures falling to between 17 and 23 with daytime temperatures reaching around 40.
Spencer Gulf Coastal Waters
- Wind
- South to southeasterly 10 to 15 knots tending south to southwesterly 15 to 20 knots in the middle of the day then tending south to southeasterly 10 to 15 knots in the late evening. Winds reaching up to 25 knots north of Cowell to Wallaroo in the evening.
- Seas
- Around 1 metre, increasing to 1 to 1.5 metres by early evening.
- 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 south of Cowell to Wallaroo.
- Weather Situation
- A low pressure trough over the west and south of SA will move northeastwards during the afternoon and evening then will linger over the northeast and far north on Friday as a ridge of high pressure builds over the south. The trough will clear to the northeast of SA late Saturday. A weak cold front will move across the southern coastal districts on Saturday as the high centre becomes established over the western Bight. The high will move slowly eastwards on Sunday and early next week.
Port Augusta Harbor Temperature Statistics View More
December Temperature
Port Augusta Airport (4km)
Lowest 2 December, 2025
12.1 °CAverage December
22.5 °CHighest 3 December, 2025
35.6 °C
Climate (2020–Present)
Port Augusta Airport (4km)
Average Low 2020–2025
12.4 °CAverage 2020–2025
18.8 °CAverage High 2020–2025
26.1 °C