Sunnyside Beach Weather Forecast

    • 12
    • 20

    Partly cloudy

    • 12
    • 20

    Possible shower

    • 11
    • 18

    Cloudy

    • 11
    • 19

    Cloudy

    • 9
    • 23

    Sunny

    • 11
    • 29

    Sunny

    • 13
    • 32

    Mostly sunny

Today 23 Dec Mornington Peninsula

Partly cloudy. Slight chance of a shower in the morning and early afternoon. Winds southwesterly 25 to 35 km/h tending westerly 20 to 30 km/h in the late evening.

Port Phillip Local Waters

Wind
Westerly 15 to 20 knots turning southwesterly during the morning.
Seas
1 to 1.5 metres, decreasing to 1 metre around midday.
Weather
Partly cloudy.
Weather Situation
A ridge of high pressure re-develops and persists across Victoria this week, with the high pressure centre expected to slowly move through Bass Strait from Friday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Sunnyside Beach Temperature Statistics View More

December Temperature

Cerberus (20km)

  • Lowest 3 December, 2025

    6 °C

  • Average December

    16.3 °C

  • Highest 18 December, 2025

    35.8 °C

Climate (2020–Present)

Cerberus (20km)

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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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