Brother and Sister Weather Forecast

    • 10
    • 15

    Possible shower

    • 9
    • 16

    Partly cloudy

    • 10
    • 18

    Mostly sunny

    • 11
    • 18

    Partly cloudy

    • 12
    • 17

    Shower or two

    • 9
    • 15

    Showers

    • 9
    • 16

    Shower or two

Today 20 May South East

Cloudy. High chance of showers in the far south, slight chance elsewhere. Winds west to northwesterly 20 to 30 km/h tending west to southwesterly 25 to 35 km/h in the morning then tending west to northwesterly 15 to 25 km/h in the late evening. Overnight temperatures falling to between 5 and 9 with daytime temperatures reaching between 10 and 15.

Storm Bay

Wind
Westerly 10 to 15 knots tending northwesterly in the early morning then turning west to southwesterly 15 to 20 knots in the morning.
Seas
Below 1 metre, increasing to 1 to 1.5 metres around midday, then decreasing below 1 metre later in the evening.
Weather
Cloudy.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Brother and Sister Temperature Statistics View More

May Temperature

Tasman Island (26km)

  • Lowest 8 May, 2026

    4.7 °C

  • Average May

    12.9 °C

  • Highest 1 May, 2026

    21.4 °C

Climate (2021–Present)

Tasman Island (26km)

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  • Average Low 2021–2026

    9.4 °C

  • Average 2021–2026

    11.5 °C

  • Average High 2021–2026

    14.6 °C
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