Cape Northumberland Weather Forecast

    • 7
    • 13

    Shower

    • 4
    • 15

    Shower

    • 4
    • 14

    Cloudy

    • 5
    • 15

    Shower

    • 7
    • 13

    Shower

    • 8
    • 13

    Shower

    • 7
    • 14

    Shower

Today 30 Jul Lower South East

Cloudy. Slight chance of a shower. Light winds becoming westerly 15 to 20 km/h in the middle of the day then becoming light in the early afternoon. Daytime maximum temperatures around 14.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
West to southwesterly about 10 knots increasing to 10 to 15 knots in the morning then decreasing to about 10 knots in the late afternoon.
Seas
Below 1 metre.
1st Swell
Southwesterly 2.5 to 3 metres.
Weather
Cloudy. 50% chance of showers.
Weather Situation
A high pressure system centred over the Bight will slowly move east into the Tasman Sea by late Saturday. A cold front is forecast to move across the Bight on Saturday before moving across the southeast of SA on Sunday.
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

    9.5 °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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