Onion Bay Weather Forecast

    • 7
    • 15

    Partly cloudy

    • 8
    • 15

    Cloudy

    • 8
    • 15

    Cloudy

    • 8
    • 19

    Shower

    • 9
    • 14

    Shower

    • 10
    • 14

    Shower

    • 8
    • 15

    Shower

Today 29 Aug South West

Partly cloudy. Winds west to southwesterly 15 to 20 km/h tending south to southwesterly in the middle of the day then becoming light in the evening. Daytime maximum temperatures around 16.

Central Victoria Coastal Waters

Cape Otway to Wilsons Promontory
Wind
Westerly 15 to 20 knots turning southwesterly during the afternoon and evening. Winds reaching up to 25 knots in the far east in the afternoon.
Seas
Around 1 metre, increasing to 1 to 1.5 metres around midday.
1st Swell
Southwesterly 1.5 to 2.5 metres.
Weather
Cloudy.
Weather Situation
A high pressure system in the Bight extends a ridge over the State during the weekend. The high moves across the State and into the Tasman Sea on Monday. A cold front approaches from the west later Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Onion Bay Temperature Statistics View More

August Temperature

Cape Otway (29km)

  • Lowest 1 August, 2026

    6.4 °C

  • Average August

    11.8 °C

  • Highest 18 August, 2026

    17 °C

Climate (2021–2026)

Cape Otway (29km)

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  • Average Low 2021–2026

    11.8 °C

  • Average 2021–2026

    14.3 °C

  • Average High 2021–2026

    17.5 °C
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