Cape Northumberland Weather Forecast

    • 13
    • 23

    Sunny

    • 12
    • 22

    Shower

    • 9
    • 14

    Partly cloudy

    • 3
    • 16

    Partly cloudy

    • 5
    • 20

    Partly cloudy

    • 11
    • 23

    Shower

    • 13
    • 23

    Cloudy

Today 19 Sep Lower South East

Sunny. Winds northwesterly 20 to 30 km/h turning northerly 15 to 20 km/h in the evening. Overnight temperatures falling to between 8 and 12 with daytime temperatures reaching the low to mid 20s.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Northwesterly 15 to 20 knots, reaching up to 25 knots south of Port MacDonnell early in the morning. Winds turning northerly in the late evening.
Seas
1 to 2 metres.
1st Swell
Westerly 2 to 3 metres, tending southwesterly 2 to 2.5 metres during the afternoon.
Weather
Sunny.
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

    11.2 °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 °C
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