Sisters Bay Weather Forecast
- 10
- 18
Partly cloudy
- 12
- 19
Shower or two
- 6
- 10
Showers
- 2
- 10
Showers easing
- 5
- 13
Partly cloudy
- 6
- 17
Mostly sunny
- 11
- 19
Partly cloudy
Today 13 Sep South East
Mostly clear. Winds north to northwesterly 20 to 30 km/h.
Lower East Coastal Waters
Wineglass Bay to Tasman Island- Wind
- Northerly 15 to 20 knots, reaching up to 25 knots offshore in the evening.
- Seas
- 1 to 1.5 metres, increasing to 1.5 to 2 metres offshore by early evening.
- 1st Swell
- South to southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2.5 metres offshore.
- Weather
- Mostly clear.
- Weather Situation
- A weak trough embedded in a westerly flow will 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. Flow turning westerly into Thursday as the high moves to the north.
Sisters Bay Temperature Statistics View More
September Temperature
Tasman Island (31km)
Lowest 9 September, 2026
4.4 °CAverage September
10.2 °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