Riddoch Bay Weather Forecast
- 11
- 21
Cloudy
- 10
- 19
Partly cloudy
- 10
- 19
Partly cloudy
- 9
- 21
Mostly sunny
- 9
- 25
Mostly sunny
- 12
- 20
Partly cloudy
- 11
- 18
Shower or two
Today 8 Dec Mount Gambier
Partly cloudy. Slight chance of a shower, most likely in the evening. Winds northwesterly 25 to 35 km/h tending westerly in the early afternoon then decreasing to 15 to 25 km/h in the evening.
Lower South East Coastal Waters
Cape Jaffa to SA-Vic Border- Wind
- West to northwesterly 15 to 20 knots, reaching up to 25 knots south of Port MacDonnell in the late afternoon. Winds tending west to southwesterly 10 to 15 knots in the evening.
- Seas
- 1.5 to 2 metres, decreasing below 1.5 metres later in the evening.
- 1st Swell
- Westerly 2.5 to 3 metres.
- Weather
- Cloudy.
- Weather Situation
- A broad ridge extends over inland parts of the state while a weak cold front clips the southeast late Monday. From Tuesday another high pressure system develops south of the Bight, strengthening the ridge over the state ahead of a trough of low pressure developing across the far northwest late Tuesday persisting late into the week.
Riddoch Bay Temperature Statistics View More
December Temperature
Mount Gambier Airport (33km)
Lowest 7 December, 2025
4.7 °CAverage December
14.3 °CHighest 3 December, 2025
28.6 °C
Climate (2020–Present)
Mount Gambier Airport (33km)
Average Low 2020–2025
8.8 °CAverage 2020–2025
13.6 °CAverage High 2020–2025
19.9 °C