Portland Bay Marina Weather Forecast

    • 10
    • 15

    Shower or two

    • 9
    • 14

    Early shower or two

    • 4
    • 14

    Possible late shower

    • 8
    • 13

    Cloudy

    • 8
    • 14

    Cloudy

    • 5
    • 16

    Partly cloudy

    • 7
    • 19

    Partly cloudy

Today 6 Sep South West

Cloudy. Medium chance of showers in the south, slight chance elsewhere. Winds westerly 15 to 20 km/h becoming light in the evening. Daytime maximum temperatures around 16.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Westerly 10 to 15 knots, reaching up to 20 knots in the far east during the afternoon and evening.
Seas
Below 1 metre, increasing to 1 to 1.5 metres in the east during the afternoon.
1st Swell
West to southwesterly 3 to 4 metres, decreasing to 3 metres by early evening.
Weather
Partly cloudy. 60% chance of showers.
Weather Situation
A high pressure ridge will extend over northern Victoria on Sunday before a cold front crosses southern Victoria on Monday. The high pressure ridge will then extend across northern Victoria on Tuesday before a weak cold front crosses southern Victoria on Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Bay Marina Temperature Statistics View More

September Temperature

Cape Nelson Lighthouse (11km)

  • Lowest 1 September, 2026

    9.2 °C

  • Average September

    13.3 °C

  • Highest 1 September, 2026

    19.3 °C

Climate (2021–2026)

Cape Nelson Lighthouse (11km)

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  • Average Low 2021–2026

    11.9 °C

  • Average 2021–2026

    14.4 °C

  • Average High 2021–2026

    17.6 °C
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