Brother and Sister Weather Forecast

    • 8
    • 13

    Partly cloudy

    • 7
    • 16

    Late showers

    • 6
    • 12

    Showers. Windy

    • 9
    • 16

    Cloud clearing

    • 9
    • 16

    Sunny

    • 7
    • 16

    Partly cloudy

    • 9
    • 18

    Shower or two

Today 7 Sep South East

Partly cloudy. Winds west to southwesterly 25 to 35 km/h tending west to northwesterly 15 to 25 km/h in the evening.

Storm Bay

Wind
Southwesterly 15 to 25 knots turning west to northwesterly below 10 knots in the evening.
Seas
1.5 to 2 metres, decreasing below 1 metre later in the evening.
Weather
Mostly clear.
Weather Situation
A ridge of high pressure over the bight and Victoria is extending a southwesterly flow across the state. A cold front is expected to cross Tasmania late Tuesday, before the ridge of high pressure approaches from the west thereafter and a southwesterly flow reestablishes.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Brother and Sister Temperature Statistics View More

September Temperature

Tasman Island (26km)

  • Lowest 4 September, 2026

    6.1 °C

  • Average September

    10.6 °C

  • Highest 1 September, 2026

    15.9 °C

Climate (2021–2026)

Tasman Island (26km)

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  • Average Low 2021–2026

    9.4 °C

  • Average 2021–2026

    11.6 °C

  • Average High 2021–2026

    14.6 °C
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