The Sisters Weather Forecast

    • 7
    • 21

    Shower or two

    • 11
    • 17

    Showers. Windy

    • 9
    • 17

    Cloudy

    • 9
    • 17

    Partly cloudy

    • 6
    • 17

    Partly cloudy

    • 9
    • 15

    Partly cloudy

    • 7
    • 16

    Mostly sunny

Today 4 Sep Mount Lofty Ranges

Partly cloudy. High chance of showers in the north, medium chance elsewhere. The chance of a thunderstorm. Winds northerly 20 to 30 km/h turning northwesterly in the evening.

South Central Coastal Waters

Wind
Northerly 15 to 20 knots turning northwesterly 15 to 25 knots in the evening. Winds reaching up to 30 knots west of Kangaroo Island in the late evening.
Seas
Around 1 metre, increasing to 1.5 metres west of Kangaroo Island later in the evening.
1st Swell
Southwesterly 4 to 5 metres.
Weather
Partly cloudy. The chance of a thunderstorm later this evening with possible squalls.
Weather Situation
A trough lies near the western border ahead of a cold front moving across the Bight, while a weak ridge of high pressure lies across central Australia. The front and trough will move across SA overnight and into southeastern Australia on Saturday, with a ridge of high pressure developing across SA in its wake. A trough is expected to develop near the western border on Sunday and remain near stationary nearly next week.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

The Sisters Temperature Statistics View More

September Temperature

Encounter Bay (8km)

  • Lowest 2 September, 2026

    7.1 °C

  • Average September

    15.1 °C

  • Highest 1 September, 2026

    22.4 °C

Climate (2021–2026)

Encounter Bay (8km)

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  • Average Low 2021–2026

    10.5 °C

  • Average 2021–2026

    15.2 °C

  • Average High 2021–2026

    20.6 °C
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