Cape Northumberland Weather Forecast
- 4
- 17
Clear
- 8
- 19
Shower
- 9
- 15
Shower
- 11
- 15
Shower
- 8
- 18
Shower
- 10
- 15
Shower
- 8
- 16
Shower
Today 31 Aug 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 3 metres.
- Weather
- Clear.
- Weather Situation
- A high pressure system centred over eastern NSW extends a ridge over SA. The ridge will weaken and the high will move eastwards on Tuesday and a cold front is expected to move across SA. Another high pressure ridge will move across the north of the state on Wednesday and Thursday and another cold front will slip across the southeast of SA early Thursday. The ridge will move eastwards early Friday then another trough and cold front will move over SA during the day.
Cape Northumberland Temperature Statistics View More
August Temperature
Mount Gambier Airport (36km)
Lowest 1 August, 2026
0.3 °CAverage August
10.4 °CHighest 17 August, 2026
19 °C
Climate (2021–2026)
Mount Gambier Airport (36km)
Average Low 2021–2026
8.9 °CAverage 2021–2026
13.7 °CAverage High 2021–2026
20.1 °C