Portland Harbour Weather Forecast

    • 10
    • 16

    Showers

    • 8
    • 13

    Showers. Windy

    • 6
    • 12

    Showers

    • 6
    • 11

    Showers

    • 5
    • 13

    Showers easing

    • 8
    • 14

    Showers

    • 7
    • 15

    Shower or two

Today 26 Aug South West

Cloudy. Very high chance of showers, most likely in the morning and afternoon. The chance of a thunderstorm in the afternoon and evening. Damaging winds possible near the Grampians. Winds northerly 25 to 40 km/h turning northwesterly 20 to 30 km/h in the early afternoon. Overnight temperatures falling to around 10 with daytime temperatures reaching between 13 and 17.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Northerly 20 to 30 knots decreasing to 20 to 25 knots before dawn then tending northwesterly 20 to 30 knots in the morning.
Seas
1.5 to 2.5 metres.
1st Swell
Southwesterly 1.5 to 2.5 metres, tending westerly 1.5 to 2.5 metres by early evening.
Weather
Cloudy. 95% chance of showers. The chance of a thunderstorm in the afternoon and evening.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Harbour Temperature Statistics View More

August Temperature

Cape Nelson Lighthouse (11km)

  • Lowest 1 August, 2025

    5.4 °C

  • Average August

    11.7 °C

  • Highest 21 August, 2025

    19.4 °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

    17.7 °C
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