Western Sister Weather Forecast

    • 12
    • 16

    Windy

    • 11
    • 16

    Cloudy

    • 12
    • 19

    Partly cloudy

    • 12
    • 24

    Sunny

    • 13
    • 28

    Sunny

    • 16
    • 26

    Shower

    • 13
    • 17

    Shower

Today 25 Dec Mornington Peninsula

Cloudy. Slight chance of a shower. Winds southwesterly 25 to 40 km/h turning southerly 25 to 35 km/h in the late evening.

Port Phillip Local Waters

Wind
South to southwesterly 20 to 25 knots.
Seas
1 to 1.5 metres.
Weather
Cloudy.
Weather Situation
A high pressure system south of the Bight extends a broad ridge east over coastal waters. The high is expected to slowly move east over Tasmania on Saturday and the Tasman Sea on Sunday while maintaining a ridge over waters. This ridge will begin clearing as a trough enters the West Coast late on Monday.
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  • Temperature Forecast Bureau of Meteorology

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Western Sister Temperature Statistics View More

December Temperature

Cerberus (36km)

  • Lowest 3 December, 2025

    6 °C

  • Average December

    16.2 °C

  • Highest 18 December, 2025

    35.8 °C

Climate (2020–Present)

Cerberus (36km)

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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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