Portland Bay Marina Weather Forecast

    • 7
    • 13

    Showers

    • 7
    • 13

    Shower or two

    • 5
    • 14

    Shower or two

    • 5
    • 16

    Mostly sunny

    • 8
    • 14

    Showers

    • 8
    • 13

    Showers

    • 6
    • 13

    Showers easing

Today 4 Aug South West

Cloudy. Very high chance of showers, becoming less likely late this afternoon and evening. Winds west to northwesterly 20 to 30 km/h tending west to southwesterly in the middle of the day then becoming light in the evening. Daytime maximum temperatures around 12.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Southwesterly 15 to 25 knots, reaching up to 30 knots in the far east in the late morning.
Seas
1.5 to 2 metres, decreasing to 1 to 1.5 metres by early evening.
1st Swell
Southwesterly 2.5 to 3 metres, increasing to 2.5 to 4 metres in the east.
Weather
Partly cloudy. 95% chance of showers.
Weather Situation
A low near Tasmania will extend troughs over southern VIC today. A high pressure system to the north will extend a ridge over the west later today, moving slowly eastwards across the state through to the end of the week as the high moves out over the Tasman Sea on Saturday. A weak front clips the south on Thursday.
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

    9.9 °C

  • Highest 2 August, 2026

    15.7 °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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