Cape Northumberland Weather Forecast

    • 8
    • 14

    Cloudy

    • 6
    • 15

    Cloudy

    • 5
    • 21

    Partly cloudy

    • 11
    • 23

    Sunny

    • 13
    • 20

    Shower

    • 10
    • 15

    Cloudy

    • 6
    • 16

    Cloudy

Today 16 Sep Lower South East

Cloudy. Winds southerly 15 to 25 km/h becoming light in the evening. Daytime maximum temperatures around 15.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Southerly 10 to 15 knots, reaching up to 20 knots south of Beachport early in the morning. Winds becoming variable below 10 knots in the late evening.
Seas
1 to 1.5 metres, decreasing below 1 metre around midday.
1st Swell
Southwesterly 4 to 5 metres.
Weather
Cloudy.
Weather Situation
A strong high pressure system south of the state will maintain a ridge across SA for the next few days as it drifts eastwards. A cold front is likely to approach from the west late Saturday and move across SA on Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Northumberland Temperature Statistics View More

September Temperature

Mount Gambier Airport (36km)

  • Lowest 8 September, 2026

    0.3 °C

  • Average September

    11.5 °C

  • Highest 12 September, 2026

    21.8 °C

Climate (2021–2026)

Mount Gambier Airport (36km)

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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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