Marion Bay Weather Forecast
- 8
- 17
Partly cloudy
- 10
- 15
Rain
- 11
- 16
Shower or two
- 10
- 17
Cloudy
- 9
- 18
Sunny
- 11
- 19
Possible shower
- 11
- 19
Mostly sunny
Today 23 Aug Yorke Peninsula
Partly cloudy. Winds northeasterly 15 to 20 km/h.
Investigator Strait Coastal Waters
- Wind
- Northeasterly below 10 knots.
- Seas
- Below 0.5 metres.
- 1st Swell
- West to southwesterly around 1 metre, increasing to 1 to 1.5 metres inshore.
- Weather
- Partly cloudy.
- Weather Situation
- A high pressure system centred over the Tasman Sea extends a ridge over eastern SA, while a low pressure system and associated trough move into the far west. The low will move across the state on Monday and out over the eastern states by late Tuesday, as another high moves in from the west to be over SA on Wednesday. A second trough approaches the southwest during Thursday afternoon.
Marion Bay Temperature Statistics View More
August Temperature
Stenhouse Bay (6km)
Lowest 1 August, 2026
4.5 °CAverage August
12.7 °CHighest 18 August, 2026
19.9 °C
Climate (2021–2026)
Stenhouse Bay (6km)
Average Low 2021–2026
13.2 °CAverage 2021–2026
16.1 °CAverage High 2021–2026
20.5 °C