Port Arthur Weather Forecast

    • 11
    • 23

    Mostly sunny

    • 12
    • 25

    Mostly sunny

    • 11
    • 19

    Partly cloudy

    • 11
    • 19

    Shower or two

    • 9
    • 17

    Shower or two

    • 10
    • 20

    Shower or two

    • 11
    • 19

    Shower or two

Today 3 Dec South East

Partly cloudy. Slight chance of a shower in the far south, near zero chance elsewhere. Winds northwesterly 25 to 40 km/h. Daytime maximum temperatures between 17 and 25.

South East Coastal Waters

Tasman Island to South East Cape
Wind
Northwesterly 15 to 20 knots, reaching up to 30 knots offshore during the day.
Seas
1 to 1.5 metres, increasing to 1.5 to 2.5 metres offshore.
1st Swell
Westerly 2 to 3 metres.
Weather
Cloudy.
Weather Situation
A high pressure system over the Tasman Sea directs a northwesterly flow over the state and it will strengthen on Wednesday. A cold front will cross Tasmania on Thursday, with a westerly flow developing in its wake and persist initially on Friday. Flow tends northwesterly later Friday ahead of an approaching cold front expected to move over the state on Saturday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Port Arthur Temperature Statistics View More

December Temperature

Tasman Island (16km)

  • Lowest 1 December, 2025

    6.6 °C

  • Average December

    9.6 °C

  • Highest 1 December, 2025

    13.6 °C

Climate (2020–Present)

Tasman Island (16km)

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  • Average Low 2020–2025

    9.3 °C

  • Average 2020–2025

    11.5 °C

  • Average High 2020–2025

    14.5 °C
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