Cape Northumberland Weather Forecast
- 4
- 17
Partly cloudy
- 7
- 19
Shower
- 9
- 15
Shower
- 11
- 15
Shower
- 8
- 18
Shower
- 10
- 15
Shower
- 9
- 15
Shower
Today 31 Aug Lower South East
Patchy morning fog. Sunny afternoon. Light winds. Daytime maximum temperatures around 18.
Lower South East Coastal Waters
Cape Jaffa to SA-Vic Border- Wind
- Variable about 10 knots becoming northerly 10 to 15 knots in the morning.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly 3 metres.
- Weather
- Partly cloudy. Patchy fog in the early morning with reduced visibility.
- Weather Situation
- A high pressure system southeast of SA continues extending a ridge across the state, as it moves over Victoria and into the Tasman Sea by late Monday. A cold front is then forecast to move across the state on Tuesday, as another ridge and high push in behind the front on Wednesday. Another cold front may slip across the southeast parts of SA early Thursday, with the high moving over eastern SA.
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