Onion Bay Weather Forecast

    • 9
    • 15

    Partly cloudy

    • 7
    • 15

    Sunny

    • 9
    • 12

    Shower

    • 6
    • 11

    Shower

    • 7
    • 10

    Shower

    • 7
    • 12

    Shower

    • 7
    • 13

    Shower

Today 6 Jul South West

Slight chance of a shower early this morning. The chance of morning fog in the west. Mostly sunny afternoon. Light winds. Daytime maximum temperatures around 15.

Central Victoria Coastal Waters

Cape Otway to Wilsons Promontory
Wind
Variable about 10 knots.
Seas
Below 0.5 metres, increasing to below 1 metre in the west.
1st Swell
Southwesterly around 1 metre, increasing to 1 to 1.5 metres in the far west.
Weather
Mostly sunny.
Weather Situation
A high pressure system over the Tasman Sea directs a northerly airstream over Victorian coastal waters as a low pressure system near Adelaide moves east. The low will weaken as it crosses Victoria today, with a ridge forecast to extend across Victoria and Bass Strait on Monday as a cold front approaches from the west. The front is forecast to cross Victorian coastal waters on Tuesday, with a weak ridge crossing Bass Strait on Wednesday as another front approaches from the west.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Onion Bay Temperature Statistics View More

July Temperature

Cape Otway (29km)

  • Lowest 4 July, 2025

    6.1 °C

  • Average July

    11.2 °C

  • Highest 4 July, 2025

    15.8 °C

Climate (2020–Present)

Cape Otway (29km)

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  • Average Low 2020–2025

    11.7 °C

  • Average 2020–2025

    14.2 °C

  • Average High 2020–2025

    17.4 °C
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