Cape Northumberland Weather Forecast
- 12
- 28
Clear
- 14
- 30
Partly cloudy
- 16
- 22
Shower
- 10
- 21
Shower
- 12
- 18
Cloudy
- 10
- 19
Cloudy
- 8
- 22
Sunny
Today 30 Mar Lower South East
Clear. Light winds.
Lower South East Coastal Waters
Cape Jaffa to SA-Vic Border- Wind
- Northerly 10 to 15 knots.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly 2 metres.
- Weather
- Clear.
- Weather Situation
- A high pressure system over the Tasman sea extends a weak ridge over SA. A trough over central WA extends over southwest SA, and is forecast to move across the west and south later Tuesday, pushing into the northeast of SA on Wednesday. Another high pressure system is expected to become established south of the Bight late in the week.
Cape Northumberland Temperature Statistics View More
March Temperature
Mount Gambier Airport (36km)
Lowest 10 March, 2026
7.2 °CAverage March
16.1 °CHighest 23 March, 2026
31.5 °C
Climate (2021–Present)
Mount Gambier Airport (36km)
Average Low 2021–2026
8.8 °CAverage 2021–2026
13.7 °CAverage High 2021–2026
20 °C