Cape Northumberland Weather Forecast

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    • 18

    Rain

    • 13
    • 19

    Rain

    • 12
    • 17

    Shower

    • 9
    • 15

    Shower

    • 9
    • 14

    Shower

    • 7
    • 15

    Shower

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    • 15

    Shower

Today 16 Jun Lower South East

Cloudy. Very high chance of rain. Winds northerly 15 to 25 km/h turning northeasterly 15 to 20 km/h in the late evening. Daytime maximum temperatures around 18.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Northerly 15 to 25 knots, reaching up to 30 knots south of Port MacDonnell early in the morning.
Seas
1.5 to 2 metres.
1st Swell
Westerly 2 to 2.5 metres, tending southwesterly 2.5 to 3 metres during the morning.
Weather
Cloudy. Near 100% chance of rain.
Weather Situation
A high pressure system centred over the Tasman Sea extends a ridge over the northeast of SA. A low pressure system will develop over the Bight on Monday then will remain slow-moving until later Thursday when it will move eastwards. An associated cold front will move across SA during Wednesday followed by a second front later Thursday. A high pressure ridge will move across from the west over the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Northumberland Temperature Statistics View More

June Temperature

Mount Gambier Airport (36km)

  • Lowest 15 June, 2026

    2.4 °C

  • Average June

    11.2 °C

  • Highest 12 June, 2026

    20.1 °C

Climate (2021–Present)

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 °C
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