Portland Bay Weather Forecast

    • 10
    • 17

    Shower or two

    • 7
    • 18

    Partly cloudy

    • 6
    • 18

    Partly cloudy

    • 8
    • 19

    Cloudy

    • 8
    • 16

    Showers

    • 9
    • 16

    Shower or two

    • 8
    • 17

    Possible shower

Today 20 May South West

Partly cloudy. High chance of showers in the south, medium chance elsewhere. Winds west to northwesterly 15 to 20 km/h tending west to southwesterly 20 to 30 km/h in the early morning then becoming light in the evening. Overnight temperatures falling to between 6 and 9 with daytime temperatures reaching around 16.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Westerly 15 to 20 knots turning southwesterly early in the morning.
Seas
1 to 1.5 metres, decreasing to 1 metre during the afternoon.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Partly cloudy. 70% chance of showers.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Bay Temperature Statistics View More

May Temperature

Portland Airport (25km)

  • Lowest 18 May, 2026

    4.7 °C

  • Average May

    13.8 °C

  • Highest 1 May, 2026

    27.3 °C

Climate (2021–Present)

Portland Airport (25km)

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  • Average Low 2021–2026

    9.7 °C

  • Average 2021–2026

    13.5 °C

  • Average High 2021–2026

    18.2 °C
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