Port Arthur Jetty Weather Forecast

    • 12
    • 20

    Mostly clear

    • 7
    • 13

    Showers

    • 7
    • 13

    Cloudy

    • 8
    • 15

    Cloudy

    • 8
    • 18

    Partly cloudy

    • 12
    • 21

    Shower or two

    • 10
    • 18

    Shower or two

Today 25 Sep South East

Partly cloudy. Medium chance of showers in the far south, most likely later tonight. Near zero chance of rain elsewhere. Winds westerly 20 to 30 km/h.

South East Coastal Waters

Tasman Island to South East Cape
Wind
West to southwesterly 20 to 25 knots, reaching up to 30 knots during the afternoon and evening.
Seas
2 to 2.5 metres.
1st Swell
Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore.
Weather
Partly cloudy.
Weather Situation
A weak trough moves over the state today ahead of a cold front forecast to cross Tasmania early Saturday morning. A high pressure system is then forecast to extend a ridge over Tasmania from the west during Saturday, before moving across the state on Sunday and Monday. The high is expected to move over the Tasman Sea during Tuesday with northerly flow building over Tasmania ahead of an approaching trough.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Port Arthur Jetty Temperature Statistics View More

September Temperature

Tasman Island (16km)

  • Lowest 16 September, 2026

    3.4 °C

  • Average September

    10.6 °C

  • Highest 20 September, 2026

    24.5 °C

Climate (2021–2026)

Tasman Island (16km)

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  • Average Low 2021–2026

    9.4 °C

  • Average 2021–2026

    11.6 °C

  • Average High 2021–2026

    14.6 °C
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