Portland Bay Weather Forecast

    • 12
    • 17

    Shower or two

    • 10
    • 18

    Partly cloudy

    • 9
    • 18

    Showers increasing

    • 9
    • 18

    Shower or two

    • 9
    • 18

    Cloudy

    • 8
    • 19

    Partly cloudy

    • 9
    • 18

    Shower or two

Today 17 May South West

Cloudy. Very high chance of showers in the east, high chance elsewhere. The chance of a thunderstorm in the late morning and afternoon. Light winds becoming south to southwesterly 15 to 20 km/h in the middle of the day then becoming light in the evening. Overnight temperatures falling to around 12 with daytime temperatures reaching around 18.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
North to northwesterly 10 to 15 knots becoming variable about 10 knots in the early morning then becoming southerly 10 to 15 knots in the middle of the day.
Seas
Around 1 metre.
1st Swell
Southwesterly 2.5 to 3 metres.
Weather
Cloudy. 80% chance of showers in the east, 50% chance elsewhere.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Bay Temperature Statistics View More

May Temperature

Portland Airport (25km)

  • Lowest 7 May, 2026

    5.9 °C

  • Average May

    14.2 °C

  • Highest 1 May, 2026

    27.3 °C

Climate (2021–Present)

Portland Airport (25km)

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  • Average Low 2021–2026

    9.6 °C

  • Average 2021–2026

    13.5 °C

  • Average High 2021–2026

    18.1 °C
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