Cape Northumberland Weather Forecast

    • 14
    • 17

    Rain

    • 9
    • 15

    Shower

    • 10
    • 14

    Shower

    • 8
    • 14

    Shower

    • 6
    • 15

    Shower

    • 9
    • 14

    Shower

    • 8
    • 14

    Shower

Today 18 Jun Lower South East

Partly cloudy. Very high chance of showers, most likely in the early morning. Winds north to northwesterly 25 to 35 km/h. Overnight temperatures falling to around 13 with daytime temperatures reaching around 17.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Northerly 20 to 30 knots tending northwesterly 20 to 25 knots in the early morning then increasing to 20 to 30 knots in the middle of the day. Winds reaching up to 35 knots south of Beachport in the late evening.
Seas
2 to 3 metres.
1st Swell
Southwesterly 1.5 metres.
Weather
Partly cloudy. Near 100% chance of showers. The chance of a thunderstorm in the afternoon and evening.
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

    11.9 °C

  • Highest 12 June, 2026

    20.1 °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 °C
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