Portland Bay Weather Forecast

    • 12
    • 20

    Cloudy

    • 11
    • 18

    Showers

    • 10
    • 21

    Shower or two

    • 10
    • 19

    Possible shower

    • 11
    • 20

    Possible shower

    • 10
    • 19

    Cloudy

    • 10
    • 20

    Cloudy

Today 20 Dec South West

Partly cloudy. Winds southwesterly 15 to 20 km/h turning south to southeasterly 15 to 25 km/h during the day. Daytime maximum temperatures 20 to 27.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Southwesterly 15 to 20 knots turning south to southeasterly below 10 knots during the afternoon and evening.
Seas
1 to 1.5 metres, decreasing below 1 metre during the morning.
1st Swell
Southwesterly 1.5 metres, increasing to 1.5 to 2 metres around midday.
Weather
Cloudy.
Weather Situation
A broad area of low pressure over Victoria and Bass Strait is expected to slowly move eastwards during today. Another, more intense, low pressure system and associated cold front are forecast to move across Victoria and Bass Strait on Sunday. A high pressure ridge then builds across the Bass Strait from Monday to Thursday to direct a west to southwesterly flow over Coastal Waters.
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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

    15.3 °C

  • Highest 18 December, 2025

    34.4 °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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