Portland Harbour Weather Forecast

    • 12
    • 17

    Possible shower

    • 12
    • 18

    Cloudy

    • 10
    • 19

    Partly cloudy

    • 12
    • 19

    Cloudy

    • 13
    • 20

    Cloudy

    • 12
    • 20

    Cloudy

    • 12
    • 21

    Partly cloudy

Today 12 Mar South West

Cloudy. Medium chance of showers, becoming less likely in the early afternoon. Winds southwesterly 25 to 35 km/h turning southerly in the afternoon. Daytime maximum temperatures around 18.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Southwesterly 15 to 25 knots turning southerly 15 to 20 knots in the evening.
Seas
1.5 to 2 metres, decreasing to 1.5 metres around midday.
1st Swell
Southwesterly 2 to 3 metres, increasing to 3 to 4 metres in the far west around midday.
Weather
Cloudy.
Weather Situation
A ridge of high pressure extends over southern Victoria. The ridge will persist through the end of the week and into the weekend as a large high pressure system crosses waters south of the Bight.
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

    17.5 °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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