Prime Beach Weather Forecast
- 4
- 20
Clear
- 7
- 25
Partly cloudy
- 12
- 29
Partly cloudy
- 12
- 26
Partly cloudy
- 14
- 28
Partly cloudy
- 17
- 29
Partly cloudy
- 18
- 30
Shower
Today 22 Sep Mid North
Clear. Light winds becoming easterly 15 to 20 km/h in the late evening.
Gulf St Vincent Coastal Waters
- Wind
- Southerly 10 to 15 knots turning east to southeasterly in the evening.
- Seas
- Below 1 metre.
- 1st Swell
- Southeast to southwesterly below 0.5 metres.
- Weather
- Clear.
- Weather Situation
- A high pressure system centred to the southeast will continue to move eastwards over Victoria and over the Tasman Sea on Tuesday. This high will continue to extend a ridge westwards over SA ahead of a low pressure trough that is expected to move over the far west of SA during Wednesday. The trough will slip southeastwards over southern coasts during Thursday and Friday.
Prime Beach Temperature Statistics View More
September Temperature
Roseworthy (32km)
Lowest 8 September, 2026
-0.2 °CAverage September
12.1 °CHighest 19 September, 2026
27.9 °C
Climate (2021–2026)
Roseworthy (32km)
Average Low 2021–2026
9.9 °CAverage 2021–2026
16.3 °CAverage High 2021–2026
23.7 °C