Port Arthur Jetty Weather Forecast

    • 8
    • 16

    Possible shower

    • 9
    • 16

    Shower or two

    • 6
    • 12

    Showers easing. Windy

    • 7
    • 15

    Showers

    • 7
    • 13

    Showers

    • 7
    • 14

    Possible shower

    • 8
    • 15

    Possible shower

Today 18 Sep South East

Partly cloudy. High chance of showers in the far south, medium chance elsewhere. Winds north to northwesterly 25 to 40 km/h. Daytime maximum temperatures between 11 and 17.

South East Coastal Waters

Tasman Island to South East Cape
Wind
West to northwesterly 15 to 20 knots tending north to northwesterly 15 to 25 knots during the morning. Winds reaching up to 30 knots in the evening.
Seas
1.5 to 2.5 metres.
1st Swell
West to southwesterly 3 to 4 metres, decreasing to 2 to 3 metres during the morning.
Weather
Partly cloudy. 70% chance of showers.
Weather Situation
A westerly airstream over Tasmania tends northwesterly today, as a high pressure system over eastern Victoria moves eastwards over the northern Tasman Sea. A series of cold fronts are expected to pass over Tasmania from early Friday morning.
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 5 September, 2025

    1.9 °C

  • Average September

    9.5 °C

  • Highest 15 September, 2025

    17.8 °C

Climate (2020–Present)

Tasman Island (16km)

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  • Average Low 2020–2025

    9.4 °C

  • Average 2020–2025

    11.5 °C

  • Average High 2020–2025

    14.6 °C
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