Cape Northumberland Weather Forecast

    • 12
    • 21

    Cloudy

    • 12
    • 30

    Partly cloudy

    • 16
    • 25

    Shower

    • 12
    • 19

    Shower

    • 9
    • 17

    Shower

    • 8
    • 15

    Shower

    • 8
    • 16

    Shower

Today 21 Oct Lower South East

Cloud clearing. Patchy morning fog in the south. Winds south to southeasterly 15 to 20 km/h tending south to southwesterly in the late afternoon then becoming light in the evening. Daytime maximum temperatures in the low to mid 20s.

Lower South East Coastal Waters

Cape Jaffa to SA-Vic Border
Wind
South to southeasterly about 10 knots tending east to southeasterly 10 to 15 knots in the middle of the day.
Seas
Below 1 metre.
1st Swell
Southwesterly 2 to 3 metres, increasing to 3 to 4 metres later in the evening.
Weather
Cloud clearing.
Weather Situation
A trough of low pressure lingers about the east, before weakening later today, as a slow moving high pressure system in the Tasman Sea will re-establish a ridge across southern parts. A trough is then forecast to briefly move into the west on Thursday, before another trough and cold front move more broadly across SA on Friday and Saturday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Northumberland Temperature Statistics View More

October Temperature

Mount Gambier Airport (36 km)

  • Lowest 7 October, 2026

    2.8 °C

  • Average October

    14.2 °C

  • Highest 18 October, 2026

    27.5 °C

Climate (2021–2026)

Mount Gambier Airport (36 km)

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  • Average Low 2021–2026

    8.9 °C

  • Average 2021–2026

    13.8 °C

  • Average High 2021–2026

    20.1 °C
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