Cape Portland Weather Forecast

    • 6
    • 18

    Partly cloudy

    • 5
    • 16

    Cloudy

    • 5
    • 16

    Partly cloudy

    • 6
    • 18

    Shower

    • 11
    • 18

    Shower

    • 8
    • 16

    Shower

    • 6
    • 16

    Shower

Today 20 May North East

Mostly clear. Winds south to southwesterly 15 to 20 km/h becoming light in the evening.

Banks Strait and Franklin

Wind
West to southwesterly 15 to 20 knots, reaching up to 25 knots about Franklin Sound in the late afternoon. Winds turning southerly 10 to 15 knots in the evening.
Seas
1 to 1.5 metres, decreasing below 1 metre later in the evening.
1st Swell
Easterly below 1 metre, increasing to 1 to 1.5 metres about Banks Strait.
Weather
Partly cloudy.
Weather Situation
A high pressure centre near Adelaide extends a ridge of high pressure over Tasmania. The ridge is expected to slowly cross over Tasmania during Thursday and Friday, bringing mostly settled weather to the state. The high is then forecast to move to the east of Tasmania later Friday as a cold front approaches from the west during Saturday, and crosses over the west later Sunday.
Graph Plots Open in Graphs
  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Portland Temperature Statistics View More

May Temperature

Swan Island (12km)

  • Lowest 7 May, 2026

    7.6 °C
  • Average May

    15.4 °C
  • Highest 1 May, 2026

    23 °C

Climate (2021–Present)

Swan Island (12km)

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  • Average Low 2021–2026

    12 °C
  • Average 2021–2026

    14.4 °C
  • Average High 2021–2026

    17.5 °C
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