Portland Bay Weather Forecast

    • 5
    • 21

    Mostly clear

    • 11
    • 22

    Shower or two

    • 11
    • 18

    Showers increasing

    • 8
    • 14

    Shower or two

    • 8
    • 14

    Cloudy

    • 7
    • 15

    Cloudy

    • 6
    • 21

    Sunny

Today 12 Sep South West

Mostly clear. Winds northerly 15 to 20 km/h.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
North to northeasterly about 10 knots increasing to 10 to 15 knots in the late evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 2.5 to 3 metres.
Weather
Mostly clear.
Weather Situation
A high pressure system currently lies over the western Tasman Sea, directing a warm northerly flow over Victoria. A low pressure trough will move across western and central Victoria later on Sunday, with a weak cold front then forecast to approach southwestern Victoria during Monday. The front will cross late Monday into early Tuesday, before a strong high pressure ridge pushes into western Victoria in its wake.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Bay Temperature Statistics View More

September Temperature

Portland Airport (25km)

  • Lowest 8 September, 2026

    2.1 °C

  • Average September

    11 °C

  • Highest 1 September, 2026

    18.2 °C

Climate (2021–2026)

Portland Airport (25km)

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  • Average Low 2021–2026

    9.7 °C

  • Average 2021–2026

    13.5 °C

  • Average High 2021–2026

    18.2 °C
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