Mouth Flat Beach Weather Forecast
- 10
- 15
Partly cloudy
- 10
- 16
Partly cloudy
- 11
- 19
Partly cloudy
- 14
- 20
Shower
- 11
- 19
Shower
- 11
- 15
Cloudy
- 10
- 15
Cloudy
Today 10 Sep Kangaroo Island
Cloud clearing. Winds east to southeasterly 15 to 25 km/h. Daytime maximum temperatures around 16.
South Central Coastal Waters
- Wind
- Easterly 10 to 15 knots, reaching up to 20 knots west of Kangaroo Island in the evening.
- Seas
- 1 to 1.5 metres, decreasing to 1 metre during the morning.
- 1st Swell
- Southwesterly 4 to 5 metres.
- Weather
- Partly cloudy.
- Weather Situation
- A high pressure system centred south of the Bight extends a ridge across the south of SA. The main high centre will gradually move eastwards 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 and move across SA on Sunday.
Mouth Flat Beach Temperature Statistics View More
September Temperature
Cape Willoughby (17km)
Lowest 2 September, 2026
9.9 °CAverage September
13.2 °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