Portland Bay Marina Weather Forecast

    • 11
    • 16

    Cloudy

    • 11
    • 18

    Cloudy

    • 12
    • 19

    Partly cloudy

    • 13
    • 21

    Partly cloudy

    • 13
    • 19

    Cloudy

    • 12
    • 20

    Partly cloudy

    • 11
    • 25

    Sunny

Today 31 Dec South West

Partly cloudy. Winds southerly 25 to 35 km/h. Daytime maximum temperatures between 18 and 22.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Southerly 15 to 20 knots turning southeasterly 10 to 15 knots in the late evening.
Seas
1 to 1.5 metres, decreasing to 1 metre around midday, then increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Cloudy.
Weather Situation
A ridge of high pressure develops across all coastal waters by this evening. This ridge will persist until Friday when a broad area of low pressure develops across western and central coasts, sweeping across to eastern coasts on Saturday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Bay Marina Temperature Statistics View More

December Temperature

Cape Nelson Lighthouse (11km)

  • Lowest 5 December, 2025

    9.7 °C

  • Average December

    15.6 °C

  • Highest 18 December, 2025

    34.6 °C

Climate (2020–Present)

Cape Nelson Lighthouse (11km)

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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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