Riddoch Bay Weather Forecast

    • 13
    • 26

    Partly cloudy

    • 15
    • 21

    Showers

    • 11
    • 18

    Rain easing

    • 10
    • 15

    Shower or two

    • 9
    • 15

    Partly cloudy

    • 7
    • 17

    Partly cloudy

    • 7
    • 19

    Partly cloudy

Today 29 Sep Mount Gambier

Partly cloudy. Slight chance of a shower later tonight. Winds northerly 25 to 40 km/h decreasing to 15 to 20 km/h in the evening then becoming light in the late evening.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
North to northeasterly 15 to 20 knots, reaching up to 25 knots offshore during the morning and early afternoon. Winds turning northwesterly 10 to 15 knots in the late afternoon.
Seas
1 to 2 metres, decreasing to 1 to 1.5 metres by early evening.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Cloudy. The chance of a thunderstorm south of Port MacDonnell later tonight.
Weather Situation
A high pressure system centred to the northeast of Tasmania extends a ridge over the southeast of the continent. This high and ridge will move eastwards over the Tasman Sea in coming days. A series of slow moving troughs will enter the west of the state today then move across the state on Wednesday and Thursday as a couple of cold fronts will move across waters to the south. A new 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

Riddoch Bay Temperature Statistics View More

September Temperature

Mount Gambier Airport (33km)

  • Lowest 22 September, 2026

    -0.3 °C
  • Average September

    11.6 °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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