Cape Northumberland Weather Forecast
- 5
- 16
Cloudy
- 5
- 19
Sunny
- 9
- 18
Shower
- 12
- 17
Shower
- 9
- 16
Shower
- 8
- 15
Shower
- 8
- 14
Shower
Today 16 Aug Lower South East
Cloudy. Patchy morning fog. Light winds becoming easterly 15 to 20 km/h in the middle of the day then becoming light in the early afternoon. Daytime maximum temperatures around 16.
Lower South East Coastal Waters
Cape Jaffa to SA-Vic Border- Wind
- Easterly about 10 knots increasing to 10 to 15 knots in the middle of the day.
- Seas
- Around 1 metre.
- 1st Swell
- Southwesterly 2.5 to 3 metres.
- Weather
- Partly cloudy.
- Weather Situation
- A high pressure system southeast of the state slowly drifts further to the southeast over Tasmania today and is forecast to be located in the Tasman Sea on Monday, while extending a ridge over much of South Australia through to Tuesday. A trough of low pressure over Queensland pushes into the far northeast of SA until Monday, as another trough moves into far southwestern parts later on Tuesday and moves southeast across the state into Wednesday.
Cape Northumberland Temperature Statistics View More
August Temperature
Mount Gambier Airport (36km)
Lowest 1 August, 2026
0.3 °CAverage August
10 °CHighest 14 August, 2026
16 °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