Cape Northumberland Weather Forecast

    • 11
    • 28

    Sunny

    • 14
    • 26

    Partly cloudy

    • 15
    • 27

    Shower

    • 12
    • 20

    Shower

    • 10
    • 21

    Cloudy

    • 9
    • 24

    Partly cloudy

    • 12
    • 22

    Partly cloudy

Today 23 Apr Lower South East

Sunny. Winds north to northeasterly 15 to 25 km/h. Daytime maximum temperatures in the high 20s.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
Northerly about 10 knots increasing to 10 to 15 knots in the morning. Winds reaching up to 20 knots offshore in the late evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 2.5 to 3 metres.
Weather
Sunny day. Patches of morning fog in the north with reduced visibility.
Weather Situation
A strong high pressure system east of Tasmania will maintain a ridge over SA this week. A cold front will pass over the south on Saturday, weakening and clearing in the east early Sunday. A new high pressure system will develop in the Bight on Sunday, slowly drifting to the southeast on Monday while continuing to extend a ridge over SA.
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 18 April, 2026

    3 °C

  • Average April

    14.3 °C

  • Highest 21 April, 2026

    26.7 °C

Climate (2021–Present)

Mount Gambier Airport (36km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    8.8 °C

  • Average 2021–2026

    13.7 °C

  • Average High 2021–2026

    20 °C
Get WillyWeather+ to remove ads