Brother and Sister Weather Forecast

    • 10
    • 21

    Rain increasing

    • 11
    • 19

    Showers easing

    • 10
    • 17

    Shower or two

    • 10
    • 16

    Showers. Windy

    • 9
    • 16

    Showers. Windy

    • 9
    • 17

    Shower or two

    • 11
    • 19

    Sunny

Today 21 Dec South East

Partly cloudy. Very high chance of rain in the late afternoon and evening. Winds west to northwesterly 15 to 25 km/h tending northeast to southeasterly in the middle of the day then tending southeast to southwesterly 20 to 30 km/h in the evening. Overnight temperatures falling to between 7 and 11 with daytime temperatures reaching between 18 and 23.

Storm Bay

Wind
West to northwesterly about 10 knots tending northeast to southeasterly 10 to 15 knots in the middle of the day then tending south to southwesterly 15 to 20 knots in the late evening.
Seas
Around 1 metre.
Weather
Partly cloudy. 90% chance of rain in the late afternoon and evening.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Brother and Sister Temperature Statistics View More

December Temperature

Tasman Island (26km)

  • Lowest 7 December, 2025

    5.4 °C

  • Average December

    12.4 °C

  • Highest 4 December, 2025

    24.6 °C

Climate (2020–Present)

Tasman Island (26km)

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  • Average Low 2020–2025

    9.3 °C

  • Average 2020–2025

    11.5 °C

  • Average High 2020–2025

    14.5 °C
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