Portland Harbour Weather Forecast

    • 4
    • 18

    Mostly clear

    • 9
    • 21

    Shower or two

    • 11
    • 18

    Showers easing

    • 9
    • 14

    Showers

    • 9
    • 15

    Cloudy

    • 8
    • 21

    Partly cloudy

    • 13
    • 23

    Shower or two

Today 23 Sep South West

Clear. Light winds.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Easterly 10 to 15 knots tending northeasterly in the late evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 2.5 to 3 metres.
Weather
Mostly clear.
Weather Situation
A high pressure system is expected to sit over the Tasman Sea for the rest of the week, directing a warm northerly airstream over Victoria. A trough will cross southern Victoria on Friday. A strong high pressure system south of the Bight will slowly move east during the weekend.
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 8 September, 2026

    3.5 °C

  • Average September

    13 °C

  • Highest 20 September, 2026

    25.5 °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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