Onion Bay Weather Forecast

    • 9
    • 17

    Cloudy

    • 10
    • 18

    Shower

    • 11
    • 17

    Shower

    • 12
    • 17

    Shower

    • 13
    • 17

    Shower

    • 12
    • 17

    Shower

    • 12
    • 18

    Shower

Today 23 May South West

Partly cloudy. Winds northeasterly 15 to 20 km/h becoming light in the early morning then becoming northeasterly 15 to 20 km/h in the morning. Overnight temperatures falling to around 7 with daytime temperatures reaching between 15 and 18.

Central Victoria Coastal Waters

Cape Otway to Wilsons Promontory
Wind
Northeasterly 10 to 15 knots, reaching up to 20 knots in the far east during the morning.
Seas
Around 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres in the west.
Weather
Mostly sunny.
Weather Situation
A ridge of high pressure over the State, extending from the Tasman Sea, will weaken over the weekend as low pressure system develops west of Bass Strait. This low is expected to move inland across southeastern SA on Monday before slowly moving over southern NSW on Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Onion Bay Temperature Statistics View More

May Temperature

Cape Otway (29km)

  • Lowest 7 May, 2026

    6.3 °C

  • Average May

    14.6 °C

  • Highest 1 May, 2026

    27.4 °C

Climate (2021–Present)

Cape Otway (29km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    11.7 °C

  • Average 2021–2026

    14.2 °C

  • Average High 2021–2026

    17.4 °C
Get WillyWeather+ to remove ads