Port Arthur Weather Forecast

    • 8
    • 14

    Shower or two

    • 11
    • 16

    Possible shower

    • 12
    • 16

    Cloudy

    • 11
    • 15

    Cloudy

    • 11
    • 17

    Partly cloudy

    • 10
    • 18

    Mostly sunny

    • 11
    • 18

    Mostly sunny

Today 8 May South East

Cloudy. High chance of showers in the far south, medium chance elsewhere. Winds southwesterly 30 to 45 km/h turning westerly 25 to 35 km/h in the evening. Daytime maximum temperatures between 9 and 14.

South East Coastal Waters

Tasman Island to South East Cape
Wind
Southwesterly 25 to 30 knots.
Seas
2.5 to 3 metres.
1st Swell
Southwesterly 4 to 5 metres.
Weather
Cloudy. 60% chance of showers.
Weather Situation
A cold southwesterly airstream will slowly weaken tonight and during Saturday as a high centre builds over the Bight. The high is expected to slowly approach Tasmania during Sunday and Monday, bringing mostly settled weather to the state. The high centre will then lie close to the south of the state by Monday evening before moving over the Tasman Sea on Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Port Arthur Temperature Statistics View More

May Temperature

Tasman Island (16km)

  • Lowest 6 May, 2026

    10.6 °C

  • Average May

    14 °C

  • Highest 1 May, 2026

    21.4 °C

Climate (2021–Present)

Tasman Island (16km)

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  • Average Low 2021–2026

    9.3 °C

  • Average 2021–2026

    11.5 °C

  • Average High 2021–2026

    14.5 °C
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