Cape Northumberland Weather Forecast

    • 11
    • 24

    Shower

    • 11
    • 15

    Cloudy

    • 10
    • 15

    Shower

    • 8
    • 15

    Cloudy

    • 6
    • 18

    Partly cloudy

    • 9
    • 22

    Partly cloudy

    • 11
    • 23

    Partly cloudy

Today 11 Oct Lower South East

Partly cloudy. High chance of showers in the afternoon and evening. The chance of a thunderstorm in the afternoon and evening. Winds northerly 25 to 35 km/h tending northwesterly 15 to 25 km/h in the late afternoon then becoming light in the evening. Daytime maximum temperatures in the mid 20s.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
North to northwesterly 15 to 20 knots, reaching up to 25 knots offshore in the late morning and early afternoon. Winds turning westerly 10 to 15 knots in the evening.
Seas
1.5 to 2 metres, decreasing to 1 to 1.5 metres by early evening.
1st Swell
West to southwesterly 4 to 5 metres.
Weather
Partly cloudy. 60% chance of showers in the afternoon and evening. The chance of a thunderstorm north of Port MacDonnell in the afternoon and evening.
Weather Situation
A ridge of high pressure to the east directs a northerly flow over South Australia. A trough and cold front about the far west will cross the state today and Monday morning. A cool southwesterly airstream will follow as a new high drifts eastwards across the Bight early this week.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Northumberland Temperature Statistics View More

October Temperature

Mount Gambier Airport (36 km)

  • Lowest 7 October, 2026

    2.8 °C

  • Average October

    13 °C

  • Highest 8 October, 2026

    25 °C

Climate (2021–2026)

Mount Gambier Airport (36 km)

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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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