Cape Northumberland Weather Forecast

    • 12
    • 25

    Shower

    • 13
    • 18

    Shower

    • 7
    • 20

    Cloudy

    • 9
    • 24

    Shower

    • 12
    • 17

    Shower

    • 9
    • 16

    Shower

    • 10
    • 17

    Shower

Today 6 Apr Lower South East

Partly cloudy. High chance of showers in the south, medium chance elsewhere. Winds north to northwesterly 15 to 25 km/h increasing to 30 km/h before turning westerly 15 to 20 km/h during the afternoon and evening. Daytime maximum temperatures in the mid to high 20s.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Northerly 15 to 20 knots turning westerly in the evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres south of Beachport around midday.
1st Swell
Southwesterly 1.5 metres.
Weather
Partly cloudy. 60% chance of showers.
Weather Situation
A trough over far western SA linking to a weak front south of the Bight will continue to move over western and southern parts of SA during today. A high pressure will move south of the Bight early in the week, before another trough and upper level system develops in the west and moves across mid to late in the week, with a vigorous cold front to follow later Thursday and into Friday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Northumberland Temperature Statistics View More

April Temperature

Mount Gambier Airport (36km)

  • Lowest 4 April, 2026

    3.6 °C

  • Average April

    13.9 °C

  • Highest 1 April, 2026

    23.6 °C

Climate (2021–Present)

Mount Gambier Airport (36km)

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  • Average Low 2021–2026

    8.8 °C

  • Average 2021–2026

    13.7 °C

  • Average High 2021–2026

    20 °C
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