Sunnyside Beach Weather Forecast

    • 13
    • 25

    Shower or two. Very windy

    • 8
    • 15

    Shower or two

    • 1
    • 16

    Sunny

    • 4
    • 19

    Mostly sunny

    • 7
    • 24

    Partly cloudy

    • 14
    • 25

    Partly cloudy

    • 12
    • 19

    Possible shower

Today 20 Sep Mornington Peninsula

Partly cloudy. Medium chance of showers, most likely later tonight. Winds northerly 30 to 45 km/h increasing to 40 to 60 km/h in the morning then turning westerly 25 to 35 km/h in the late afternoon.

Port Phillip Local Waters

Wind
Northerly 15 to 25 knots increasing to 20 to 30 knots in the morning then turning west to northwesterly 15 to 25 knots in the early afternoon. Winds reaching up to 35 knots in the south in the early afternoon.
Seas
Around 1 metre, increasing to 1 to 2 metres during the morning, then decreasing to 1 metre by early evening.
Weather
Mostly sunny.
Weather Situation
A high pressure system over NSW is directing a northwesterly airstream across Victoria as a cold front crosses waters south of the Bight. The front is forecast to enter western Victoria this afternoon, reaching central districts during the evening before crossing eastern Victoria tonight. A cold southwesterly airstream will follow on Monday as a high pressure system south of the Bight moves rapidly east, reaching western Bass Strait by Monday night. The high will be located over the Tasman Sea by Tuesday night and continue moving east into Wednesday as warm northeasterly winds develop over Victoria.
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  • Temperature Forecast Bureau of Meteorology

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Sunnyside Beach Temperature Statistics View More

September Temperature

Cerberus (20km)

  • Lowest 18 September, 2026

    2.4 °C
  • Average September

    12.9 °C
  • Highest 13 September, 2026

    25.6 °C

Climate (2021–2026)

Cerberus (20km)

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  • Average Low 2021–2026

    10.2 °C
  • Average 2021–2026

    14.6 °C
  • Average High 2021–2026

    19.7 °C
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