Sisters Bay Weather Forecast
- 5
- 14
Clear
- 4
- 14
Sunny
- 9
- 18
Partly cloudy
- 12
- 18
Shower or two
- 5
- 9
Showers
- 4
- 12
Shower or two
- 6
- 13
Partly cloudy
Today 11 Sep South East
Mostly clear. Winds westerly 20 to 30 km/h.
Lower East Coastal Waters
Wineglass Bay to Tasman Island- Wind
- West to southwesterly 15 to 20 knots, reaching up to 30 knots offshore in the late afternoon. Winds tending west to northwesterly 10 to 15 knots in the late evening.
- Seas
- 1.5 to 2.5 metres.
- 1st Swell
- South to southwesterly 2 to 3 metres inshore, increasing to 3 to 5 metres offshore.
- Weather
- Mostly clear.
- Weather Situation
- A high pressure system over southern Victoria is forecast to move over the Tasman Sea by early Saturday and continue to slowly move east. A weak trough is expected to cross Tasmania late Sunday. A cold front is then expected to approach the state from the west on Monday, directing the flow northwesterly before crossing Tasmania overnight into early Tuesday. A southwesterly flow will establish over the state in its wake.
Sisters Bay Temperature Statistics View More
September Temperature
Tasman Island (31km)
Lowest 9 September, 2026
4.4 °CAverage September
10.1 °CHighest 1 September, 2026
15.9 °C
Climate (2021–2026)
Tasman Island (31km)
Average Low 2021–2026
9.4 °CAverage 2021–2026
11.6 °CAverage High 2021–2026
14.6 °C