Sisters Bay Weather Forecast
- 6
- 14
Mostly sunny
- 5
- 15
Mostly sunny
- 8
- 16
Partly cloudy
- 13
- 20
Shower or two
- 7
- 12
Shower or two
- 4
- 12
Partly cloudy
- 5
- 15
Partly cloudy
Today 22 Sep South East
Partly cloudy. Slight chance of a shower in the south, most likely in the morning. Near zero chance of rain elsewhere. Snow possible above 800 metres. Possible small hail in the south in the morning and afternoon. Winds westerly 25 to 35 km/h turning northwesterly 15 to 20 km/h in the late evening. Overnight temperatures falling to between 3 and 8 with daytime temperatures reaching between 11 and 17.
Lower East Coastal Waters
Wineglass Bay to Tasman Island- Wind
- Westerly 15 to 20 knots, reaching up to 30 knots offshore during the morning. Winds shifting north to northeasterly in the early afternoon.
- Seas
- 2 to 3 metres, decreasing to 1 to 1.5 metres around midday, then decreasing to 1 metre during the afternoon.
- 1st Swell
- Southwesterly 2 to 3 metres inshore, increasing to 4 to 6 metres offshore.
- Weather
- Mostly sunny.
- Weather Situation
- A high pressure system centred over the Bight is expected to move to the north of Tasmania this morning and lie over the northern Tasman Sea during Wednesday and Thursday, maintaining ridge dominated conditions over Tasmania. A trough is forecast to move over the state from the west during Friday ahead of a cold front to cross later.
Sisters Bay Temperature Statistics View More
September Temperature
Tasman Island (31km)
Lowest 16 September, 2026
3.4 °CAverage September
10.7 °CHighest 20 September, 2026
24.5 °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