Portland Harbour Weather Forecast

    • 7
    • 14

    Partly cloudy

    • 6
    • 19

    Partly cloudy

    • 8
    • 16

    Showers increasing. Windy

    • 7
    • 14

    Showers increasing

    • 9
    • 15

    Shower or two

    • 8
    • 14

    Shower or two

    • 8
    • 15

    Shower or two

Today 17 Sep South West

Partly cloudy. Medium chance of showers near the Otways, slight chance elsewhere. Winds westerly 25 to 40 km/h becoming light in the evening. Daytime maximum temperatures around 14.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Westerly 15 to 25 knots, reaching up to 30 knots in the east in the late morning. Winds turning northwesterly 15 to 20 knots in the evening.
Seas
2 to 3 metres, decreasing to 1 to 1.5 metres by early evening.
1st Swell
Westerly 5 metres, tending southwesterly 4 to 5 metres by early evening.
Weather
Partly cloudy.
Weather Situation
Strong westerly flow over Bass Strait will persist as a high pressure system passes to the north of Victoria. The high will move into the Tasman on Thursday, before another cold front crosses Bass Strait on Friday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Harbour Temperature Statistics View More

September Temperature

Cape Nelson Lighthouse (11km)

  • Lowest 6 September, 2025

    7.8 °C

  • Average September

    13 °C

  • Highest 15 September, 2025

    24.9 °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

    17.6 °C
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