Gunnamatta Beach Weather Forecast

    • 13
    • 24

    Windy

    • 9
    • 14

    Shower

    • 4
    • 16

    Partly cloudy

    • 6
    • 18

    Partly cloudy

    • 10
    • 24

    Partly cloudy

    • 14
    • 24

    Shower

    • 12
    • 17

    Shower

Today 20 Sep Mornington Peninsula

Partly cloudy. Medium chance of showers, most likely at night. Winds northerly 40 to 60 km/h turning westerly 25 to 35 km/h in the late afternoon.

Central Victoria Coastal Waters

Cape Otway to Wilsons Promontory
Wind
North to northwesterly 25 to 30 knots turning westerly in the late afternoon.
Seas
2 to 3 metres.
1st Swell
Southwesterly 1.5 to 2.5 metres, tending westerly 2 to 3 metres by early evening.
Weather
Mostly sunny day. 60% chance of showers in the evening.
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.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Gunnamatta Beach Temperature Statistics View More

September Temperature

Cerberus (28km)

  • Lowest 18 September, 2026

    2.4 °C

  • Average September

    12.9 °C

  • Highest 13 September, 2026

    25.6 °C

Climate (2021–2026)

Cerberus (28km)

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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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