Portland Offshore Weather Forecast

    • 6
    • 20

    Mostly sunny

    • 11
    • 21

    Showers increasing

    • 11
    • 16

    Showers increasing

    • 9
    • 13

    Shower or two

    • 8
    • 13

    Cloudy

    • 7
    • 14

    Cloudy

    • 5
    • 20

    Sunny

Today 12 Sep South West

The chance of morning fog. Sunny afternoon. Light winds becoming northerly 15 to 25 km/h in the morning. Overnight temperatures falling to around 5 with daytime temperatures reaching around 20.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
North to northeasterly about 10 knots increasing to 10 to 15 knots in the late evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 3 to 4 metres, decreasing to 2.5 to 3 metres during the morning.
Weather
Mostly sunny.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Offshore Temperature Statistics View More

September Temperature

Cape Nelson Lighthouse (9km)

  • Lowest 8 September, 2026

    3.5 °C

  • Average September

    12.3 °C

  • Highest 1 September, 2026

    19.3 °C

Climate (2021–2026)

Cape Nelson Lighthouse (9km)

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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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