Cape Northumberland Weather Forecast

    • 5
    • 16

    Partly cloudy

    • 8
    • 14

    Shower

    • 7
    • 16

    Shower

    • 11
    • 16

    Shower

    • 10
    • 15

    Shower

    • 8
    • 16

    Shower

    • 6
    • 16

    Partly cloudy

Today 10 Jul Lower South East

Partly cloudy. Slight chance of a shower. Winds northeasterly 15 to 20 km/h turning northerly 15 to 25 km/h in the morning. Daytime maximum temperatures around 16.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Northerly 15 to 20 knots, reaching up to 30 knots offshore in the late evening.
Seas
Around 1 metre, increasing to 1 to 2 metres around midday.
1st Swell
Southwesterly 2.5 to 3 metres.
Weather
Partly cloudy. 70% chance of showers.
Weather Situation
A high pressure system centred east of Tasmania extends a ridge over SA. A cold front will move across the south of SA during Saturday followed by weaker fronts near southern coasts on Sunday and Monday. Another high pressure system develops over southern WA early next week and extends a ridge over western SA.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Northumberland Temperature Statistics View More

July Temperature

Mount Gambier Airport (36km)

  • Lowest 7 July, 2026

    -1.1 °C

  • Average July

    8.2 °C

  • Highest 1 July, 2026

    16.7 °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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