Cape Northumberland Weather Forecast

    • 7
    • 19

    Partly cloudy

    • 8
    • 24

    Partly cloudy

    • 12
    • 25

    Partly cloudy

    • 14
    • 27

    Partly cloudy

    • 16
    • 27

    Partly cloudy

    • 15
    • 25

    Shower

    • 14
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    Cloudy

Today 15 Oct Lower South East

Partly cloudy. Winds easterly 15 to 20 km/h becoming light in the middle of the day. Daytime maximum temperatures around 20.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Easterly 10 to 15 knots, reaching up to 20 knots south of Port MacDonnell in the late morning and afternoon. Winds decreasing to about 10 knots in the late evening.
Seas
1 to 1.5 metres, decreasing below 1 metre later in the evening.
1st Swell
Southwesterly 1.5 to 2 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system moves southeast across waters to the south of SA, reaching the Tasman Sea later on Thursday and extends a ridge over the state until early next week. Another trough moves into the far west on Friday before weakening over the weekend.
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

    12.9 °C

  • Highest 11 October, 2026

    25.5 °C

Climate (2021–2026)

Mount Gambier Airport (36 km)

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  • Average Low 2021–2026

    8.9 °C

  • Average 2021–2026

    13.8 °C

  • Average High 2021–2026

    20.1 °C
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