Portland Offshore Weather Forecast

    • 10
    • 15

    Shower or two

    • 7
    • 15

    Cloudy

    • 9
    • 17

    Shower or two

    • 9
    • 14

    Shower or two

    • 8
    • 15

    Partly cloudy

    • 6
    • 17

    Possible shower

    • 9
    • 16

    Showers

Today 22 Aug South West

Cloudy. Medium chance of showers, becoming less likely this afternoon. Winds westerly 20 to 30 km/h tending southwesterly 15 to 25 km/h in the middle of the day then becoming light in the evening. Daytime maximum temperatures around 15.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
West to southwesterly 15 to 25 knots, reaching up to 30 knots during the morning. Winds tending west to northwesterly below 10 knots in the evening.
Seas
2 to 3 metres, decreasing to 1 to 1.5 metres around midday, then decreasing to 1 metre by early evening.
1st Swell
Westerly 3 to 4 metres, tending southwesterly 4 to 5 metres during the morning.
Weather
Cloudy.
Weather Situation
A ridge of high pressure over northern parts of the State will remain throughout the weekend as a couple of cold fronts pass well to the south in a broad westerly flow. The ridge will weaken and move over the Tasman Sea on Monday and a low pressure system and associated trough will approach from the west, moving to the north of the State on Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Offshore Temperature Statistics View More

August Temperature

Cape Nelson Lighthouse (9km)

  • Lowest 1 August, 2026

    5.6 °C

  • Average August

    11.8 °C

  • Highest 19 August, 2026

    17.9 °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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