Portland Bay Marina Weather Forecast

    • 10
    • 15

    Shower or two

    • 9
    • 15

    Cloudy

    • 6
    • 16

    Partly cloudy

    • 8
    • 15

    Shower or two

    • 7
    • 14

    Partly cloudy

    • 7
    • 14

    Cloudy

    • 5
    • 18

    Partly cloudy

Today 25 Aug South West

Cloudy. High chance of showers, becoming less likely in the late afternoon and evening. Winds southwesterly 15 to 25 km/h. Daytime maximum temperatures around 14.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Southwesterly about 10 knots increasing to 15 to 20 knots in the middle of the day.
Seas
Around 1 metre, increasing to 1 to 1.5 metres by early evening.
1st Swell
Southwesterly 2.5 to 3 metres.
Weather
Partly cloudy.
Weather Situation
A low pressure system will cross quickly eastwards across the State on Tuesday and move into the Tasman Sea in the evening. A large high pressure system over South Australia will begin to extend a ridge over western Victoria on Wednesday with the high pressure centre slowly moving the north on Thursday, remaining relatively stationary on Friday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Bay Marina Temperature Statistics View More

August Temperature

Cape Nelson Lighthouse (11km)

  • Lowest 1 August, 2026

    5.6 °C

  • Average August

    11.9 °C

  • Highest 19 August, 2026

    17.9 °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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