Brother and Sister Weather Forecast

    • 15
    • 24

    Mostly sunny

    • 13
    • 23

    Showers increasing

    • 11
    • 19

    Shower or two clearing

    • 12
    • 21

    Partly cloudy

    • 14
    • 24

    Mostly sunny

    • 13
    • 22

    Partly cloudy

    • 13
    • 23

    Partly cloudy

Today 20 Jan South East

Mostly sunny. Winds northwest to northeasterly 15 to 25 km/h tending northeast to southeasterly in the middle of the day then becoming light in the late evening. Overnight temperatures falling to between 9 and 14 with daytime temperatures reaching 21 to 26.

Storm Bay

Wind
Northerly 10 to 15 knots turning east to northeasterly in the late morning.
Seas
Below 1 metre.
Weather
Sunny.
Weather Situation
A high pressure system centred over the southern Tasman Sea will move away to the southeast today. A cold front will move across the state from the west on Wednesday. A high pressure ridge will then extend across later in the week.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Brother and Sister Temperature Statistics View More

January Temperature

Tasman Island (26km)

  • Lowest 11 January, 2026

    5.8 °C

  • Average January

    13.7 °C

  • Highest 6 January, 2026

    20.3 °C

Climate (2021–Present)

Tasman Island (26km)

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  • Average Low 2021–2026

    9.3 °C

  • Average 2021–2026

    11.5 °C

  • Average High 2021–2026

    14.5 °C
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