Cape Northumberland Weather Forecast

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    • 15

    Partly cloudy

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    • 16

    Partly cloudy

    • 6
    • 15

    Partly cloudy

    • 7
    • 15

    Partly cloudy

    • 8
    • 16

    Shower

    • 8
    • 16

    Shower

    • 7
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    Shower

Today 17 Jul Lower South East

Patchy morning fog. Mostly sunny afternoon. Light winds becoming northerly 15 to 20 km/h in the morning then becoming light in the early afternoon. Daytime maximum temperatures around 15.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
North to northwesterly 10 to 15 knots, reaching up to 20 knots offshore during the morning and early afternoon.
Seas
Around 1 metre, increasing to 1 to 1.5 metres during the morning, then decreasing to 1 metre by early evening.
1st Swell
Southwesterly 3 metres, increasing to 3 to 4 metres south of Beachport.
Weather
Partly cloudy.
Weather Situation
A strong high pressure system over eastern SA will slowly move east over the rest of the week and the weekend.
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

    9.6 °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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