Portland Bay Weather Forecast

    • 8
    • 20

    Mostly sunny

    • 8
    • 29

    Mostly sunny

    • 12
    • 20

    Partly cloudy

    • 10
    • 19

    Shower or two. Windy

    • 10
    • 18

    Cloudy

    • 9
    • 19

    Partly cloudy

    • 8
    • 26

    Sunny

Today 11 Dec South West

Mostly sunny. Winds southeasterly 20 to 30 km/h. Overnight temperatures falling to around 7 with daytime temperatures reaching 21 to 27.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
East to southeasterly 15 to 20 knots.
Seas
Below 1 metre, increasing to 1 to 1.5 metres around midday.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Sunny.
Weather Situation
A ridge of high pressure extends across Victoria today with the high centre to the south of the Bight forecast to move eastwards across Tasmania. A trough is forecast to extend from NSW into the northeast of Victoria during today, before a more significant trough is forecast to move across the far west on Friday then over the remainder of the state on Saturday. A cold front in expected to move through Bass Strait during Sunday with increasing south to southwesterly flow over the state as a secondary high pressure ridge extends over from the west.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Bay Temperature Statistics View More

December Temperature

Portland Airport (25km)

  • Lowest 5 December, 2025

    6.9 °C
  • Average December

    14 °C
  • Highest 4 December, 2025

    26.4 °C

Climate (2020–Present)

Portland Airport (25km)

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  • Average Low 2020–2025

    9.6 °C
  • Average 2020–2025

    13.4 °C
  • Average High 2020–2025

    18.1 °C
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