Port Arthur Jetty Weather Forecast

    • 10
    • 15

    Possible shower

    • 9
    • 16

    Partly cloudy

    • 10
    • 18

    Partly cloudy

    • 11
    • 18

    Partly cloudy

    • 12
    • 17

    Shower or two

    • 9
    • 15

    Showers

    • 9
    • 16

    Shower or two

Today 20 May South East

Cloudy. High chance of showers in the far south, slight chance elsewhere. Winds west to northwesterly 20 to 30 km/h tending west to southwesterly 25 to 35 km/h in the morning then tending west to northwesterly 15 to 25 km/h in the late evening. Daytime maximum temperatures between 10 and 15.

South East Coastal Waters

Tasman Island to South East Cape
Wind
Westerly 15 to 25 knots, turning southwesterly 20 to 30 knots during the morning.
Seas
1.5 to 2.5 metres.
1st Swell
Southwesterly 1.5 to 2.5 metres.
Weather
Cloudy. 80% chance of showers.
Weather Situation
A high pressure centre near the South Australian coast extends a ridge of high pressure to the west of Tasmania. The ridge slowly approaches Tasmania and is expected to cross 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.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Port Arthur Jetty Temperature Statistics View More

May Temperature

Tasman Island (16km)

  • Lowest 8 May, 2026

    4.7 °C

  • Average May

    12.9 °C

  • Highest 1 May, 2026

    21.4 °C

Climate (2021–Present)

Tasman Island (16km)

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  • Average Low 2021–2026

    9.4 °C

  • Average 2021–2026

    11.5 °C

  • Average High 2021–2026

    14.6 °C
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