Portland Harbour Weather Forecast

    • 9
    • 15

    Partly cloudy

    • 7
    • 14

    Possible shower

    • 6
    • 14

    Partly cloudy

    • 6
    • 17

    Partly cloudy

    • 7
    • 18

    Sunny morning. Shower or two

    • 11
    • 16

    Showers

    • 9
    • 15

    Showers

Today 14 Aug South West

Cloudy. Medium chance of showers, becoming less likely in the late afternoon and evening. Winds westerly 15 to 25 km/h tending southwesterly 15 to 20 km/h in the early afternoon then becoming light in the late afternoon. Daytime maximum temperatures around 14.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
West to southwesterly 10 to 15 knots, reaching up to 20 knots in the far east in the late morning. Winds tending south to southwesterly below 10 knots during the afternoon and evening.
Seas
1 to 1.5 metres, decreasing below 1 metre during the afternoon.
1st Swell
Southwesterly 4 to 5 metres.
Weather
Cloudy.
Weather Situation
A high pressure system developing south of the Bight extends a ridge over Victoria. The high pressure system will drift slowly to the southeast over Tasmania over the weekend and centred over the Tasman Sea by early next week.
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, 2026

    5.6 °C

  • Average August

    11.4 °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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