Sterile Island Weather Forecast

    • 4
    • 20

    Shower

    • 11
    • 16

    Shower

    • 7
    • 12

    Shower

    • 4
    • 13

    Shower

    • 5
    • 15

    Cloudy

    • 5
    • 21

    Partly cloudy

    • 10
    • 20

    Shower

Today 24 Sep South East

Partly cloudy. Slight chance of a shower in the evening. Winds northwest to southwesterly 15 to 20 km/h becoming light before dawn then becoming northwest to northeasterly 20 to 30 km/h in the morning. Daytime maximum temperatures between 16 and 23.

South East Coastal Waters

Tasman Island to South East Cape
Wind
Northwest to southwesterly 10 to 15 knots tending northeasterly in the early morning then tending northwest to northeasterly in the evening. Winds reaching up to 20 knots near Tasman Island in the late afternoon.
Seas
1 to 1.5 metres, decreasing to 1 metre during the morning.
1st Swell
Southwesterly 2 to 3 metres, decreasing to 2 metres later in the evening.
Weather
Partly cloudy.
Weather Situation
A weak ridge extends over Tasmania from a high pressure system over the central Tasman Sea. The ridge weakens further Thursday, as a trough approaches from the west in the evening. Another weak trough is forecast to move over the state from the west during Friday ahead of a cold front to cross later. A secondary high pressure system is forecast to extend a ridge over Tasmania from the southwest during Saturday, and move over on Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Sterile Island Temperature Statistics View More

September Temperature

Cape Bruny (14km)

  • Lowest 21 September, 2026

    4.1 °C

  • Average September

    11.3 °C

  • Highest 20 September, 2026

    26.5 °C

Climate (2021–2026)

Cape Bruny (14km)

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  • Average Low 2021–2026

    9.6 °C

  • Average 2021–2026

    12.5 °C

  • Average High 2021–2026

    16.6 °C
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