Cape Portland Weather Forecast

    • 3
    • 16

    Clear

    • 6
    • 18

    Partly cloudy

    • 11
    • 18

    Shower

    • 9
    • 14

    Shower

    • 4
    • 15

    Partly cloudy

    • 4
    • 15

    Partly cloudy

    • 9
    • 16

    Windy

Today 12 Sep North East

Mostly sunny. Light winds becoming west to northwesterly 15 to 20 km/h in the evening. Daytime maximum temperatures between 16 and 19.

Banks Strait and Franklin

Wind
West to northwesterly about 10 knots.
Seas
Below 1 metre.
1st Swell
Northwest to southwesterly around 1 metre.
Weather
Mostly sunny.
Weather Situation
A high pressure system over southern Victoria is forecast to move over the Tasman Sea early today and continue to slowly move east. A weak trough is expected to cross Tasmania late Sunday. A cold front is then expected to approach the state from the west on Monday, directing the flow northwesterly before crossing Tasmania overnight into early Tuesday. A southwesterly flow will establish over the state in its wake.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Portland Temperature Statistics View More

September Temperature

Swan Island (12km)

  • Lowest 10 September, 2026

    8.1 °C

  • Average September

    12.4 °C

  • Highest 6 September, 2026

    17 °C

Climate (2021–2026)

Swan Island (12km)

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  • Average Low 2021–2026

    12 °C

  • Average 2021–2026

    14.4 °C

  • Average High 2021–2026

    17.5 °C
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