Round Island Weather Forecast

    • 11
    • 20

    Rain. Becoming windy

    • 11
    • 19

    Possible shower. Wind easing

    • 11
    • 18

    Shower or two. Wind easing

    • 11
    • 19

    Shower or two. Windy

    • 11
    • 17

    Wind easing. Cloudy

    • 11
    • 17

    Cloudy

    • 11
    • 22

    Sunny

Today 21 Dec Central

Cloudy. The chance of fog in the east in the early morning. Very high chance of rain. The chance of a thunderstorm in the morning and afternoon. Winds northeast to southeasterly 15 to 20 km/h tending south to southeasterly in the middle of the day then turning southwesterly 20 to 30 km/h in the early afternoon. Overnight temperatures falling to between 9 and 12 with daytime temperatures reaching between 19 and 23.

Western Port Local Waters

Wind
Variable about 10 knots becoming southeast to southwesterly 15 to 20 knots in the middle of the day then tending southwesterly in the late evening. Winds reaching up to 25 knots west of Sandy Point in the evening.
Seas
Below 1 metre, increasing to 1 to 1.5 metres west of Sandy Point during the afternoon.
Weather
Cloudy. 90% chance of rain. The chance of a thunderstorm in the afternoon.
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  • 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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