MacDonnell Bay Weather Forecast
- 3
- 17
Partly cloudy
- 7
- 22
Partly cloudy
- 12
- 19
Shower
- 11
- 17
Shower
- 10
- 13
Shower
- 8
- 14
Cloudy
- 7
- 16
Partly cloudy
Today 11 Sep Lower South East
Clear. Light winds.
Lower South East Coastal Waters
Cape Jaffa to SA-Vic Border- Wind
- Easterly 10 to 15 knots decreasing to about 10 knots in the late evening.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly 4 metres.
- Weather
- Mostly clear.
- Weather Situation
- A high pressure system east of SA extends a ridge across much of the state, as a low pressure trough over the interior of WA weakens overnight. Another trough will approach from the west late on Saturday, move across SA on Sunday with a ridge then extending into the state from a high located southwest of WA. An upper level disturbance will move over the far west on Monday, and a cold front will slip across southern coasts later in the day and early Tuesday. The high will then move across waters to the south throughout the week.
MacDonnell Bay Temperature Statistics View More
September Temperature
Mount Gambier Airport (34km)
Lowest 8 September, 2026
0.3 °CAverage September
10.8 °CHighest 1 September, 2026
18.3 °C
Climate (2021–2026)
Mount Gambier Airport (34km)
Average Low 2021–2026
8.9 °CAverage 2021–2026
13.7 °CAverage High 2021–2026
20 °C