Cape Northumberland Weather Forecast
- 15
- 22
Shower
- 12
- 18
Shower
- 10
- 24
Shower
- 10
- 16
Shower
- 9
- 15
Shower
- 7
- 15
Cloudy
- 8
- 16
Partly cloudy
Today 9 Oct Lower South East
Partly cloudy. Slight chance of a shower. Winds northwesterly 20 to 30 km/h.
Lower South East Coastal Waters
Cape Jaffa to SA-Vic Border- Wind
- Northwesterly 20 to 25 knots.
- Seas
- 1.5 to 2 metres.
- 1st Swell
- Southwesterly 2.5 metres.
- Weather
- Partly cloudy.
- Weather Situation
- A trough and cold front clear to the east of the state state overnight, as a high pressure system briefly establishes in the north on Saturday. Another series of troughs and cold fronts are expected to enter western SA early on Sunday, crossing the state and then clearing in the east by the end of Monday. A ridge of high pressure will then push into western SA on Monday before the associated high moves into waters south on Tuesday. A trough over the WA/NT border will also extend into SA at times from Monday.
Cape Northumberland Temperature Statistics View More
October Temperature
Mount Gambier Airport (36 km)
Lowest 7 October, 2026
2.8 °CAverage October
12.1 °CHighest 7 October, 2026
18.9 °C
Climate (2021–2026)
Mount Gambier Airport (36 km)
Average Low 2021–2026
8.9 °CAverage 2021–2026
13.7 °CAverage High 2021–2026
20.1 °C