Waterfall Bay (Port Arthur) Weather Forecast

    • 9
    • 20

    Partly cloudy

    • 13
    • 20

    Shower or two

    • 8
    • 12

    Showers

    • 6
    • 13

    Showers easing

    • 8
    • 15

    Partly cloudy

    • 8
    • 18

    Partly cloudy

    • 12
    • 21

    Mostly sunny

Today 13 Sep South East

Partly cloudy. Slight chance of a shower. Winds north to northwesterly 15 to 20 km/h tending west to northwesterly 15 to 25 km/h before dawn then tending north to northwesterly 20 to 30 km/h in the early morning. Overnight temperatures falling to between 3 and 8 with daytime temperatures reaching between 18 and 23.

South East Coastal Waters

Tasman Island to South East Cape
Wind
Northerly about 10 knots increasing to 15 to 20 knots in the early morning.
Seas
Below 1 metre, increasing to 1 to 1.5 metres around midday.
1st Swell
Southwesterly 2 to 3 metres inshore, increasing to 2.5 to 4 metres offshore.
Weather
Partly cloudy.
Weather Situation
A high pressure system off the NSW coast is slowly moving over the Tasman Sea, with light winds over Tasmania expected to turn northwesterly as the high moves further offshore. A weak trough is expected to cross Tasmania late today. A cold front is then expected to approach the state from the west on Monday, crossing Tasmania overnight. A southwesterly flow will establish over Tasmania from Tuesday, as a high in the Bight extends a ridge over the state on Wednesday.
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 9 September, 2026

    4.4 °C

  • Average September

    10.2 °C

  • Highest 1 September, 2026

    15.9 °C

Climate (2021–2026)

Tasman Island (15km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    9.4 °C

  • Average 2021–2026

    11.6 °C

  • Average High 2021–2026

    14.6 °C
Get WillyWeather+ to remove ads