Mouth Flat Beach Weather Forecast
- 9
- 16
Sunny
- 11
- 18
Shower
- 9
- 15
Shower
- 12
- 16
Shower
- 10
- 17
Shower
- 11
- 16
Shower
- 10
- 17
Shower
Today 31 Aug Kangaroo Island
Patchy morning fog. Sunny afternoon. Light winds becoming northeasterly 15 to 20 km/h in the morning then tending northerly in the middle of the day. Daytime maximum temperatures around 18.
South Central Coastal Waters
- Wind
- Northeasterly 10 to 15 knots turning northerly in the early afternoon.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly 3 metres.
- Weather
- Sunny. Patchy fog inshore 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.
Mouth Flat Beach Temperature Statistics View More
August Temperature
Cape Willoughby (17km)
Lowest 4 August, 2026
8.9 °CAverage August
12.8 °CHighest 28 August, 2026
18.5 °C
Climate (2021–2026)
Cape Willoughby (17km)
Average Low 2021–2026
13.3 °CAverage 2021–2026
15.4 °CAverage High 2021–2026
18.5 °C