Sullivan Bay Weather Forecast

    • 10
    • 14

    Windy

    • 7
    • 15

    Partly cloudy

    • 7
    • 18

    Sunny

    • 11
    • 22

    Partly cloudy

    • 15
    • 22

    Shower

    • 12
    • 17

    Shower

    • 10
    • 19

    Partly cloudy

Today 21 Sep Mornington Peninsula

Slight chance of a shower this morning. Mostly sunny afternoon. Winds southwesterly 25 to 35 km/h decreasing to 15 to 25 km/h in the middle of the day then turning southerly 15 to 20 km/h in the evening.

Port Phillip Local Waters

Wind
Southwesterly 15 to 20 knots, reaching up to 25 knots in the south early in the morning. Winds turning southerly 10 to 15 knots in the early afternoon.
Seas
1 to 1.5 metres, decreasing to 1 metre during the afternoon.
Weather
Partly cloudy.
Weather Situation
A cool southwesterly airstream will cross Victoria today as a high pressure system moves over waters south of the Bight, reaching western Bass Strait by tonight. The high will be located over the Tasman Sea by Tuesday night, with a warm northeasterly airstream continuing on Wednesday and Thursday as the high continues moving east.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Sullivan Bay Temperature Statistics View More

September Temperature

Cerberus (36km)

  • Lowest 18 September, 2026

    2.4 °C

  • Average September

    13.3 °C

  • Highest 13 September, 2026

    25.6 °C

Climate (2021–2026)

Cerberus (36km)

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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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