Portland Harbour Weather Forecast

    • 9
    • 26

    Partly cloudy

    • 17
    • 25

    Partly cloudy

    • 11
    • 19

    Partly cloudy

    • 10
    • 18

    Shower or two

    • 9
    • 17

    Partly cloudy

    • 10
    • 19

    Shower or two

    • 12
    • 17

    Possible shower

Today 3 Dec South West

Partly cloudy. Winds northwesterly 20 to 30 km/h decreasing to 15 to 20 km/h in the evening.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Northwesterly 15 to 20 knots, reaching up to 25 knots in the far west in the late afternoon.
Seas
1 to 1.5 metres, increasing to 1.5 to 2 metres in the far west.
1st Swell
West to southwesterly 2 to 2.5 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system over the Tasman Sea directs a northwesterly flow over Victoria, strengthening this evening and Thursday ahead of a trough which will cross the state late on Thursday. Another weak trough and low pressure system are expected to move over Victoria on Friday, before a cold front moves over the south during Saturday. A ridge of high pressure is then forecast to build over the state on Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Harbour Temperature Statistics View More

December Temperature

Cape Nelson Lighthouse (11km)

  • Lowest 1 December, 2025

    9.9 °C

  • Average December

    12.8 °C

  • Highest 1 December, 2025

    14.7 °C

Climate (2020–Present)

Cape Nelson Lighthouse (11km)

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  • Average Low 2020–2025

    11.8 °C

  • Average 2020–2025

    14.3 °C

  • Average High 2020–2025

    17.5 °C
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