Portland Offshore Weather Forecast

    • 11
    • 19

    Partly cloudy

    • 11
    • 16

    Showers

    • 10
    • 16

    Showers easing

    • 9
    • 17

    Showers

    • 6
    • 13

    Showers

    • 9
    • 16

    Showers easing

    • 10
    • 15

    Shower or two

Today 3 May South West

Partly cloudy. Very high chance of rain, most likely in the early morning. The chance of a thunderstorm. Winds northerly 25 to 40 km/h. Overnight temperatures falling to between 10 and 13 with daytime temperatures reaching between 17 and 21.

West Victoria Coastal Waters

SA-Vic Border to Cape Otway
Wind
Northerly 15 to 25 knots, reaching up to 30 knots in the west in the evening.
Seas
1 to 2 metres, increasing to 2 to 4 metres by early evening.
1st Swell
Southwesterly 1.5 to 2 metres, tending westerly 2 to 4 metres during the morning.
Weather
Partly cloudy. 70% chance of showers. The chance of a thunderstorm.
Weather Situation
A low pressure system drifts eastward south of the Bight, extending a cold front over western Bass Strait. This front will move slowly eastward, reaching eastern waters on Sunday afternoon. The low pressure system is then expected to move over Bass Strait or southern Victoria on Monday with a cool southwesterly airstream in its wake. A cold front moving south of the Bight is likely to reach western waters later Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Portland Offshore Temperature Statistics View More

May Temperature

Cape Nelson Lighthouse (9km)

  • Lowest 1 May, 2026

    17.9 °C

  • Average May

    21.2 °C

  • Highest 1 May, 2026

    28.1 °C

Climate (2021–Present)

Cape Nelson Lighthouse (9km)

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  • Average Low 2021–2026

    11.8 °C

  • Average 2021–2026

    14.3 °C

  • Average High 2021–2026

    17.6 °C
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