Mouth Flat Beach Weather Forecast
- 10
- 14
Windy
- 10
- 15
Partly cloudy
- 10
- 16
Partly cloudy
- 11
- 19
Partly cloudy
- 14
- 20
Shower
- 12
- 19
Shower
- 11
- 15
Shower
Today 9 Sep Kangaroo Island
Cloudy. Winds southeasterly 25 to 35 km/h. Daytime maximum temperatures around 14.
South Central Coastal Waters
- Wind
- Southeasterly 15 to 25 knots.
- Seas
- 1.5 to 2 metres.
- 1st Swell
- Southwesterly 4 to 5 metres.
- Weather
- Cloudy.
- Weather Situation
- A high pressure system centred south of WA extends a ridge across the south of SA. The main high centre will move eastwards during the week to be centred to the east of SA on Friday. A trough over the interior of WA will remain stationary for most of the week and may extend into the far west of SA at times. Another low pressure trough will approach from the west on Saturday.
Mouth Flat Beach Temperature Statistics View More
September Temperature
Cape Willoughby (17km)
Lowest 2 September, 2026
9.9 °CAverage September
13.3 °CHighest 4 September, 2026
18.1 °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