Round Island Weather Forecast

    • 13
    • 19

    Cloudy

    • 11
    • 20

    Showers. Becoming windy

    • 11
    • 18

    Shower or two. Wind easing

    • 11
    • 17

    Shower or two

    • 12
    • 19

    Shower or two. Windy

    • 11
    • 17

    Possible shower

    • 11
    • 17

    Cloudy

Today 20 Dec Central

Partly cloudy. Medium chance of showers in the east this morning. Near zero chance of rain elsewhere. The chance of a thunderstorm about the ranges in the early afternoon. Winds west to southwesterly 15 to 20 km/h turning south to southeasterly 15 to 25 km/h in the late morning and afternoon. Daytime maximum temperatures 21 to 27.

Western Port Local Waters

Wind
Southwesterly 10 to 15 knots, reaching up to 20 knots west of Sandy Point during the morning. Winds turning southerly in the late afternoon.
Seas
Around 1 metre.
Weather
Cloudy.
Weather Situation
A broad area of low pressure over Victoria and Bass Strait is expected to slowly move eastwards during today. Another, more intense, low pressure system and associated cold front are forecast to move across Victoria and Bass Strait on Sunday. A high pressure ridge then builds across the Bass Strait from Monday to Thursday to direct a west to southwesterly flow over Coastal Waters.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Round Island Temperature Statistics View More

December Temperature

Cerberus (18km)

  • Lowest 3 December, 2025

    6 °C

  • Average December

    16.5 °C

  • Highest 18 December, 2025

    35.8 °C

Climate (2020–Present)

Cerberus (18km)

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  • Average Low 2020–2025

    10.1 °C

  • Average 2020–2025

    14.5 °C

  • Average High 2020–2025

    19.5 °C
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