Descartes Bay Weather Forecast

    • 9
    • 14

    Partly cloudy

    • 4
    • 16

    Partly cloudy

    • 5
    • 20

    Sunny

    • 11
    • 23

    Cloudy

    • 14
    • 21

    Shower or two

    • 11
    • 16

    Shower or two

    • 10
    • 22

    Partly cloudy

Today 21 Sep South West

Cloudy. Slight chance of a shower near the Otways, becoming less likely this morning. Near zero chance of rain elsewhere. Winds south to southwesterly 20 to 30 km/h becoming light in the evening. Daytime maximum temperatures around 13.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Southwesterly 15 to 25 knots decreasing to about 10 knots in the evening.
Seas
1.5 to 2.5 metres, decreasing to 1 metre around midday.
1st Swell
Southwesterly 4 to 5 metres.
Weather
Partly cloudy.
Weather Situation
A cool southwesterly airstream will cross Victoria today as a high pressure system moves over waters south of the Bight, reaching western Bass Strait by tonight. The high will be located over the Tasman Sea by Tuesday night, with a warm northeasterly airstream continuing on Wednesday and Thursday as the high continues moving east.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Descartes Bay Temperature Statistics View More

September Temperature

Portland Airport (7km)

  • Lowest 8 September, 2026

    2.1 °C

  • Average September

    12.2 °C

  • Highest 19 September, 2026

    22.3 °C

Climate (2021–2026)

Portland Airport (7km)

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  • Average Low 2021–2026

    9.7 °C

  • Average 2021–2026

    13.5 °C

  • Average High 2021–2026

    18.2 °C
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