Marion Bay Weather Forecast
- 11
- 18
Showers. Windy
- 10
- 16
Shower or two. Wind easing
- 11
- 17
Shower or two
- 10
- 17
Partly cloudy
- 9
- 17
Partly cloudy
- 10
- 17
Cloudy
- 10
- 19
Partly cloudy
Today 19 Sep Yorke Peninsula
Partly cloudy. High chance of showers in the south, medium chance elsewhere. Winds westerly 20 to 30 km/h increasing to 30 to 45 km/h in the morning then turning southwesterly 25 to 35 km/h in the evening. Daytime maximum temperatures around 19.
Investigator Strait Coastal Waters
- Wind
- Westerly 20 to 30 knots tending southwesterly in the evening.
- Seas
- 1 to 1.5 metres, increasing to 2 to 3 metres around midday.
- 1st Swell
- Westerly 1 to 1.5 metres, increasing to 1 to 2 metres around midday, then tending west to southwesterly 1.5 to 2.5 metres later in the evening.
- Weather
- Partly cloudy. 70% chance of showers.
- Weather Situation
- A cold front will move over SA coasts during Friday afternoon and evening then a southwesterly airstream will follow the front and will persist over the weekend. A high pressure system centred west of Perth will extend a ridge across the north of SA over the weekend then the high will become centred over the Bight early next week and the ridge will move over southern SA.
Marion Bay Temperature Statistics View More
September Temperature
Stenhouse Bay (6km)
Lowest 18 September, 2025
6.6 °CAverage September
13.9 °CHighest 6 September, 2025
24.2 °C
Climate (2020–Present)
Stenhouse Bay (6km)
Average Low 2020–2025
13.1 °CAverage 2020–2025
16 °CAverage High 2020–2025
20.5 °C