Portland Harbour Weather Forecast

    • 14
    • 21

    Cloudy

    • 11
    • 15

    Showers

    • 10
    • 15

    Shower or two

    • 12
    • 18

    Shower or two

    • 12
    • 19

    Cloudy

    • 11
    • 22

    Partly cloudy

    • 14
    • 27

    Sunny

Today 25 Mar South West

Partly cloudy. Medium chance of showers, becoming less likely in the afternoon. The chance of a thunderstorm in the afternoon and early evening. Winds westerly 15 to 25 km/h turning southwesterly 20 to 30 km/h in the late afternoon. Daytime maximum temperatures 22 to 27.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Westerly 15 to 20 knots turning southwesterly in the evening.
Seas
Around 1 metre, increasing to 1.5 metres during the afternoon.
1st Swell
Southwesterly 1.5 metres, increasing to 1.5 to 2 metres in the far west.
Weather
Partly cloudy.
Weather Situation
A high pressure system to the east will allow a trough to move over the state today. A cold southerly flow will follow on Thursday and Friday. A new high pressure system south of the Bight on Friday, is expected to move slowly east towards Victoria on the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Harbour Temperature Statistics View More

March Temperature

Cape Nelson Lighthouse (11km)

  • Lowest 10 March, 2026

    11.3 °C

  • Average March

    16.8 °C

  • Highest 1 March, 2026

    23.3 °C

Climate (2021–Present)

Cape Nelson Lighthouse (11km)

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  • Average Low 2021–2026

    11.8 °C

  • Average 2021–2026

    14.3 °C

  • Average High 2021–2026

    17.6 °C
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