Brother and Sister Weather Forecast
- 11
- 21
Sunny
- 11
- 22
Showers
- 10
- 17
Shower or two
- 9
- 19
Partly cloudy
- 11
- 20
Partly cloudy
- 11
- 20
Showers
- 10
- 18
Shower or two
Today 30 Oct South East
Mostly sunny. Winds west to northwesterly 15 to 25 km/h tending southeast to southwesterly in the early afternoon then tending northwest to northeasterly 15 to 20 km/h in the late evening. Daytime maximum temperatures between 19 and 24.
Storm Bay
- Wind
- Variable below 10 knots becoming southeasterly 10 to 15 knots in the early afternoon then tending southerly 15 to 20 knots in the late afternoon.
- Seas
- Below 1 metre, increasing to 1 to 1.5 metres by early evening.
- Weather
- Sunny.
- Weather Situation
- A fresh west to southwesterly airstream persists over Tasmania, easing this morning as a ridge of high pressure extends down from Victoria. A cold front is forecast to cross the state on Saturday afternoon, before clearing to the east on Sunday with another ridge of high pressure expected to quickly follow. A low is forecast to move over central Victoria during Monday afternoon.
Brother and Sister Temperature Statistics View More
October Temperature
Tasman Island (26 km)
Lowest 13 October, 2026
4 °CAverage October
11.8 °CHighest 23 October, 2026
28.3 °C
Climate (2021–2026)
Tasman Island (26 km)
Average Low 2021–2026
9.4 °CAverage 2021–2026
11.6 °CAverage High 2021–2026
14.7 °C