Portland Offshore Weather Forecast

    • 14
    • 32

    Mostly sunny

    • 14
    • 18

    Cloudy

    • 11
    • 17

    Cloudy

    • 11
    • 18

    Partly cloudy

    • 13
    • 22

    Mostly sunny

    • 13
    • 25

    Partly cloudy

    • 13
    • 21

    Partly cloudy

Today 29 Dec South West

Sunny. Winds northeasterly 15 to 20 km/h tending northwest to northeasterly 15 to 25 km/h in the morning then tending southeast to southwesterly in the evening. Daytime maximum temperatures in the mid to high 30s.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Northeasterly 10 to 15 knots, reaching up to 20 knots in the east during the day. Winds turning east to southeasterly during the morning and early afternoon.
Seas
Below 1 metre, increasing to 1 to 1.5 metres in the east during the morning.
1st Swell
West to southwesterly 1.5 to 2 metres.
Weather
Becoming cloudy.
Weather Situation
A high pressure system over the Tasman Sea is extending a ridge over Victoria. A trough will slowly cross from the west during Tuesday, and linger about the northeast on Wednesday as a high pressure system south of the Bight extends a ridge over Tasmania. On Thursday, Victoria will lie between a ridge over Tasmania and a trough in central NSW.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Offshore Temperature Statistics View More

December Temperature

Cape Nelson Lighthouse (9km)

  • Lowest 5 December, 2025

    9.7 °C

  • Average December

    15.3 °C

  • Highest 18 December, 2025

    34.6 °C

Climate (2020–Present)

Cape Nelson Lighthouse (9km)

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  • Average Low 2020–2025

    11.8 °C

  • Average 2020–2025

    14.3 °C

  • Average High 2020–2025

    17.5 °C
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