Brother and Sister Weather Forecast

    • 9
    • 15

    Cloudy

    • 10
    • 18

    Possible shower

    • 11
    • 17

    Sunny

    • 10
    • 23

    Shower or two. Windy

    • 7
    • 14

    Shower or two

    • 8
    • 14

    Shower or two

    • 8
    • 17

    Partly cloudy

Today 17 Sep South East

Cloudy. Medium chance of showers in the south, near zero chance elsewhere. Winds westerly 25 to 35 km/h increasing to 25 to 40 km/h in the evening. Overnight temperatures falling to between 4 and 8 with daytime temperatures reaching between 10 and 16.

Storm Bay

Wind
Westerly 15 to 20 knots turning northwesterly 10 to 15 knots in the late evening.
Seas
Around 1 metre.
Weather
Cloudy.
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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 16 September, 2026

    3.4 °C

  • Average September

    10.4 °C

  • Highest 14 September, 2026

    19.9 °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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