Riddoch Bay Weather Forecast

    • 13
    • 22

    Shower or two. Windy

    • 9
    • 14

    Partly cloudy

    • 1
    • 16

    Morning frost. Sunny

    • 4
    • 20

    Sunny

    • 10
    • 23

    Partly cloudy

    • 13
    • 21

    Shower or two

    • 12
    • 16

    Shower or two

Today 20 Sep Mount Gambier

Partly cloudy. High chance of showers, most likely in the late afternoon and evening. Winds northwesterly 35 to 45 km/h tending westerly 35 to 50 km/h in the middle of the day then tending southwesterly 20 to 25 km/h in the late evening.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
West to northwesterly 20 to 30 knots turning southwesterly in the evening.
Seas
2 to 2.5 metres.
1st Swell
Southwesterly 2 to 3 metres, increasing to 2.5 to 4 metres south of Port MacDonnell during the afternoon.
Weather
Partly cloudy. 50% chance of showers.
Weather Situation
A cold front will cross the west of the state this morning and will track across the east of the state during the day. Another high pressure system will move eastwards across waters to the south during Monday 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.
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

    11.5 °C

  • Highest 18 September, 2026

    22.2 °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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