MacDonnell Bay Weather Forecast

    • 6
    • 16

    Shower

    • 8
    • 15

    Shower

    • 7
    • 15

    Shower

    • 5
    • 16

    Partly cloudy

    • 7
    • 21

    Partly cloudy

    • 14
    • 22

    Shower

    • 10
    • 18

    Shower

Today 2 Sep Lower South East

Partly cloudy. High chance of showers, most likely in the evening. The chance of a thunderstorm in the south in the late afternoon and evening. Winds northwesterly 25 to 40 km/h. Daytime maximum temperatures around 17.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Northwesterly 25 to 30 knots turning westerly 20 to 30 knots in the late afternoon.
Seas
2 to 3 metres.
1st Swell
Southwesterly 3 metres, tending westerly 3 to 4 metres by early evening.
Weather
Cloudy. 95% chance of showers. The chance of a thunderstorm in the late afternoon and evening.
Weather Situation
A weak high pressure ridge will briefly give way to a trough passing over coastal waters on Tuesday before re-establishing on Wednesday. Another trough will move across from the west on Thursday connected to an associated low pressure in the Bight. This trough will dissipate through Friday when a northeasterly airstream establishes over waters on Friday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

MacDonnell Bay Temperature Statistics View More

September Temperature

Mount Gambier Airport (34km)

  • Lowest 1 September, 2025

    6.5 °C

  • Average September

    9.5 °C

  • Highest

    –

Climate (2020–Present)

Mount Gambier Airport (34km)

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  • Average Low 2020–2025

    8.8 °C

  • Average 2020–2025

    13.7 °C

  • Average High 2020–2025

    20 °C
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