Descartes Bay Weather Forecast

    • 6
    • 19

    Partly cloudy

    • 10
    • 17

    Showers increasing. Windy

    • 7
    • 14

    Showers increasing

    • 10
    • 15

    Showers

    • 9
    • 13

    Shower or two

    • 9
    • 15

    Shower or two

    • 10
    • 16

    Cloudy

Today 18 Sep South West

Partly cloudy. Slight chance of a shower in the south, most likely this evening. Near zero chance of rain elsewhere. Winds northerly 15 to 20 km/h tending north to northwesterly 30 to 45 km/h in the morning then becoming northerly 20 to 30 km/h in the evening. Daytime maximum temperatures around 19.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Northerly 15 to 20 knots, reaching up to 25 knots in the far west in the late morning and early afternoon. Winds turning northwesterly in the early afternoon.
Seas
1 to 1.5 metres, decreasing to 1 metre later in the evening.
1st Swell
West to southwesterly 2.5 to 3 metres.
Weather
Partly cloudy. The chance of a thunderstorm offshore in the afternoon and evening.
Weather Situation
A weak high pressure system to the north of Victoria will move into the Tasman Sea today, before a series of cold fronts cross Bass Strait between late Friday and early Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Descartes Bay Temperature Statistics View More

September Temperature

Portland Airport (7km)

  • Lowest 5 September, 2025

    2.2 °C

  • Average September

    11.9 °C

  • Highest 15 September, 2025

    24.1 °C

Climate (2020–Present)

Portland Airport (7km)

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  • Average Low 2020–2025

    9.7 °C

  • Average 2020–2025

    13.5 °C

  • Average High 2020–2025

    18.1 °C
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