Riddoch Bay Weather Forecast

    • 9
    • 14

    Cloudy

    • 2
    • 16

    Morning frost. Sunny

    • 4
    • 20

    Sunny

    • 11
    • 24

    Cloudy

    • 13
    • 22

    Shower or two

    • 13
    • 19

    Cloudy

    • 11
    • 23

    Partly cloudy

Today 21 Sep Mount Gambier

Cloudy. Winds southerly 15 to 25 km/h becoming light in the late afternoon.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
South to southwesterly 10 to 15 knots tending south to southeasterly below 10 knots in the afternoon.
Seas
1 to 1.5 metres, decreasing to 1 metre around midday.
1st Swell
Southwesterly 4 to 5 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system will move eastwards across waters to the south today then over Victoria and the Tasman Sea on Tuesday. This high will extend a ridge westwards over SA ahead of a low pressure trough that is expected to move over the far west of SA during Wednesday. The trough will slip southeastwards over the Bight during Thursday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Riddoch Bay Temperature Statistics View More

September Temperature

Mount Gambier Airport (33km)

  • Lowest 8 September, 2026

    0.3 °C

  • Average September

    11.8 °C

  • Highest 19 September, 2026

    25.8 °C

Climate (2021–2026)

Mount Gambier Airport (33km)

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  • Average Low 2021–2026

    8.9 °C

  • Average 2021–2026

    13.7 °C

  • Average High 2021–2026

    20.1 °C
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