Waterfall Bay (Port Arthur) Weather Forecast

    • 12
    • 17

    Mostly clear

    • 8
    • 14

    Shower or two

    • 9
    • 13

    Showers easing. Wind easing

    • 8
    • 15

    Partly cloudy

    • 10
    • 15

    Shower or two

    • 8
    • 13

    Shower or two

    • 7
    • 13

    Shower or two

Today 20 Aug South East

Partly cloudy. Slight chance of a shower in the south, becoming less likely later this evening. Near zero chance of rain elsewhere. Winds westerly 15 to 25 km/h turning northwesterly 15 to 20 km/h in the evening.

South East Coastal Waters

Tasman Island to South East Cape
Wind
Westerly 15 to 20 knots, reaching up to 25 knots offshore in the late afternoon.
Seas
1 to 1.5 metres, increasing to 1 to 2 metres offshore.
1st Swell
West to southwesterly 1.5 to 2 metres.
Weather
Partly cloudy.
Weather Situation
A series of troughs and fronts embedded in a westerly flow are expected to cross Tasmania over the coming days. A high pressure system to the north of Tasmania brings stable conditions from late Saturday before it moves into the Tasman Sea on Sunday. A cold front then approaches Tasmania from the west on Monday, directing a northwesterly flow over the state.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Waterfall Bay (Port Arthur) Temperature Statistics View More

August Temperature

Tasman Island (15km)

  • Lowest 15 August, 2026

    6.1 °C

  • Average August

    9.9 °C

  • Highest 1 August, 2026

    13.7 °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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