Merri Island Weather Forecast

    • 6
    • 21

    Mostly sunny

    • 11
    • 22

    Shower or two

    • 11
    • 17

    Showers increasing

    • 9
    • 13

    Shower or two

    • 8
    • 14

    Cloudy

    • 7
    • 14

    Cloudy

    • 5
    • 20

    Sunny

Today 12 Sep Warrnambool

Mostly sunny. Light winds becoming northerly 15 to 20 km/h in the late evening.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
North to northeasterly about 10 knots increasing to 10 to 15 knots in the late evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 3 to 4 metres, decreasing to 2.5 to 3 metres during the morning.
Weather
Mostly sunny.
Weather Situation
A strong high pressure system sits over eastern Victoria. The high will move over the Tasman Sea today, with winds tending warmer northerly. A low pressure trough will move across western and central Victoria later on Sunday, with a weak cold front then forecast to approach southwestern Victoria on Monday. The front will cross late Monday into early Tuesday and a high pressure ridge will push into western Victoria in its wake.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Merri Island Temperature Statistics View More

September Temperature

Warrnambool Airport (12km)

  • Lowest 11 September, 2026

    0.6 °C

  • Average September

    10.2 °C

  • Highest 1 September, 2026

    18.2 °C

Climate (2021–2026)

Warrnambool Airport (12km)

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  • Average Low 2021–2026

    8.8 °C

  • Average 2021–2026

    13.5 °C

  • Average High 2021–2026

    19.1 °C
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