Waterfall Bay (Port Arthur) Weather Forecast

    • 9
    • 15

    Cloudy

    • 10
    • 18

    Possible shower

    • 11
    • 17

    Sunny

    • 10
    • 23

    Shower or two. Windy

    • 7
    • 14

    Shower or two

    • 8
    • 14

    Shower or two

    • 9
    • 17

    Partly cloudy

Today 17 Sep South East

Cloudy. Medium chance of showers in the south, near zero chance elsewhere. Winds westerly 25 to 35 km/h increasing to 25 to 40 km/h in the evening. Daytime maximum temperatures between 10 and 16.

South East Coastal Waters

Tasman Island to South East Cape
Wind
Westerly 25 to 30 knots, reaching up to 35 knots during the day.
Seas
2.5 to 4 metres.
1st Swell
Southwesterly 4 to 5 metres.
Weather
Cloudy. 70% chance of showers.
Weather Situation
A high moving over Victoria directs a cold west to southwesterly wind over Tasmania. Strong and gusty northwesterly winds are forecast on Friday as a deep low pressure system develops well to the south. A weak ridge is forecast to extend over the state on Saturday, before a cold front crosses the state on Sunday.
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

    10.4 °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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