Waterfall Bay (Port Arthur) Weather Forecast

    • 9
    • 18

    Shower or two

    • 11
    • 17

    Mostly sunny

    • 9
    • 23

    Shower or two. Becoming windy

    • 7
    • 14

    Shower or two

    • 8
    • 15

    Possible shower

    • 9
    • 17

    Partly cloudy

    • 10
    • 16

    Shower or two

Today 18 Sep South East

Partly cloudy. High chance of showers, most likely in the late afternoon and evening. Damaging winds possible. Winds west to northwesterly 45 to 65 km/h. Daytime maximum temperatures between 14 and 19.

South East Coastal Waters

Tasman Island to South East Cape
Wind
Northwesterly 25 to 40 knots turning westerly 25 to 35 knots during the afternoon and evening.
Seas
2 to 4 metres.
1st Swell
West to southwesterly 4 to 6 metres.
Weather
Partly cloudy. 80% chance of showers.
Weather Situation
A high over western Victoria directs a westerly flow over Tasmania. Strong and gusty winds are forecast on Friday as a front passes well to the south of Tasmania. A weak ridge is forecast to extend over the state on Saturday, directing the flow northwesterly, before a cold front crosses the state on Sunday evening. The flow will turn southwesterly on Monday behind the front, as a high establishes over the Bight.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Waterfall Bay (Port Arthur) Temperature Statistics View More

September Temperature

Tasman Island (15km)

  • Lowest 16 September, 2026

    3.4 °C

  • Average September

    10.3 °C

  • Highest 14 September, 2026

    19.9 °C

Climate (2021–2026)

Tasman Island (15km)

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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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