Cape Northumberland Weather Forecast
- 7
- 22
Partly cloudy
- 11
- 21
Cloudy
- 12
- 17
Shower
- 9
- 14
Shower
- 8
- 14
Cloudy
- 6
- 15
Cloudy
- 6
- 21
Sunny
Today 12 Sep Lower South East
Partly cloudy. Winds northeasterly 15 to 20 km/h.
Lower South East Coastal Waters
Cape Jaffa to SA-Vic Border- Wind
- North to northeasterly 10 to 15 knots.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly 2.5 metres.
- Weather
- Partly cloudy.
- Weather Situation
- A trough is approaching from the west and will move across SA on Sunday, as an upper level disturbance moves over the far west later on Sunday. A high pressure ridge will also extend into the state from a high located southwest of WA from late Sunday. A cold front will then slip across southern coasts late Monday and early Tuesday, before the high moves across waters to the south to be centred over Victoria by Thursday.
Cape Northumberland Temperature Statistics View More
September Temperature
Mount Gambier Airport (36km)
Lowest 8 September, 2026
0.3 °CAverage September
11 °CHighest 11 September, 2026
19.4 °C
Climate (2021–2026)
Mount Gambier Airport (36km)
Average Low 2021–2026
8.9 °CAverage 2021–2026
13.7 °CAverage High 2021–2026
20 °C