Mouth Flat Beach Weather Forecast

    • 11
    • 20

    Partly cloudy

    • 15
    • 24

    Cloudy

    • 14
    • 21

    Shower

    • 12
    • 19

    Rain

    • 10
    • 15

    Partly cloudy

    • 9
    • 15

    Partly cloudy

    • 10
    • 17

    Partly cloudy

Today 28 Sep Kangaroo Island

Partly cloudy. Winds easterly 15 to 25 km/h turning northeasterly 20 to 30 km/h in the late morning and afternoon. Daytime maximum temperatures in the low 20s.

South Central Coastal Waters

Wind
Easterly 15 to 20 knots turning northeasterly in the evening.
Seas
1 to 1.5 metres, increasing to 1 to 2 metres west of Kangaroo Island.
1st Swell
Southwesterly 2 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system centred west of Tasmania extends a ridge northeastwards over the southeast of the continent. This high and ridge will move eastwards over the Tasman Sea overnight. A series of troughs will then move across from WA during the middle and later part of the week and a couple of cold fronts will move across waters to the south. A high pressure system will become established south of the Bight during Friday.
Graph Plots Open in Graphs
  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mouth Flat Beach Temperature Statistics View More

September Temperature

Cape Willoughby (17km)

  • Lowest 2 September, 2026

    9.9 °C
  • Average September

    14 °C
  • Highest 24 September, 2026

    24.8 °C

Climate (2021–2026)

Cape Willoughby (17km)

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  • Average Low 2021–2026

    13.4 °C
  • Average 2021–2026

    15.4 °C
  • Average High 2021–2026

    18.5 °C
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