Cape Northumberland Weather Forecast

    • 8
    • 15

    Shower

    • 8
    • 15

    Rain

    • 9
    • 14

    Shower

    • 7
    • 16

    Shower

    • 7
    • 14

    Shower

    • 10
    • 16

    Shower

    • 9
    • 16

    Shower

Today 8 Aug Lower South East

Cloudy. Very high chance of showers. Winds northerly 15 to 20 km/h increasing to 30 km/h before turning northeasterly 20 to 25 km/h during the morning and early afternoon. Daytime maximum temperatures around 15.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Northerly 15 to 25 knots, reaching up to 30 knots offshore during the day.
Seas
1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning.
1st Swell
Southwesterly 2.5 to 3 metres.
Weather
Cloudy. 95% chance of showers.
Weather Situation
A weak high pressure system centred over NSW and a cold front approaching from the west result in a northerly airstream over SA this morning. The vigorous cold front will move across the west late Saturday then moving across remaining parts of the State on Sunday. A high pressure system moves just to the north on Monday, ahead of another cold front forecast to move across South Australia on Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Northumberland Temperature Statistics View More

August Temperature

Mount Gambier Airport (36km)

  • Lowest 1 August, 2026

    0.3 °C

  • Average August

    8.6 °C

  • Highest 2 August, 2026

    15.7 °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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