Onion Bay Weather Forecast

    • 6
    • 14

    Cloudy

    • 9
    • 16

    Shower

    • 10
    • 14

    Shower

    • 8
    • 13

    Cloudy

    • 6
    • 15

    Partly cloudy

    • 7
    • 15

    Shower

    • 9
    • 15

    Shower

Today 23 Aug South West

Cloudy. Patchy morning fog. Light winds becoming northwesterly 15 to 25 km/h in the morning then tending northerly 15 to 20 km/h in the evening. Daytime maximum temperatures around 15.

Central Victoria Coastal Waters

Cape Otway to Wilsons Promontory
Wind
West to northwesterly 10 to 15 knots tending north to northwesterly below 10 knots during the day.
Seas
Around 1 metre.
1st Swell
Southwesterly 2 to 2.5 metres, increasing to 2 to 4 metres in the west.
Weather
Cloudy.
Weather Situation
A ridge of high pressure over northern parts of the State will remain throughout the weekend as a cold front passes well to the south in a broad westerly flow. The ridge will weaken and move over the Tasman Sea on Monday and a low pressure system and associated trough will approach from the west, moving quickly over the north of the State on Tuesday and out of the Tasman on Wednesday.
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  • 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

    11.7 °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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