Diamond Island Weather Forecast

    • 14
    • 23

    Possible shower

    • 11
    • 14

    Shower or two

    • 6
    • 15

    Partly cloudy

    • 5
    • 16

    Sunny

    • 5
    • 21

    Partly cloudy

    • 11
    • 22

    Shower or two

    • 12
    • 23

    Shower or two

Today 25 Sep East Coast

Partly cloudy. Medium chance of showers. Winds west to northwesterly 15 to 25 km/h becoming light in the evening. Overnight temperatures falling to between 8 and 13 with daytime temperatures reaching between 18 and 23.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northwesterly 15 to 20 knots shifting south to southeasterly in the evening. Winds reaching up to 25 knots offshore in the evening.
Seas
1 to 1.5 metres, increasing to 1 to 2 metres offshore.
1st Swell
Southerly around 1 metre.
Weather
Partly cloudy.
Weather Situation
A weak trough moves over the state today ahead of a cold front which crosses early tomorrow morning. A high pressure system is then forecast to extend a ridge over Tasmania from the southwest during Saturday, before moving across the state on Sunday and Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Diamond Island Temperature Statistics View More

September Temperature

Bicheno (Council Depot) (2km)

  • Lowest 23 September, 2026

    3 °C

  • Average September

    13.8 °C

  • Highest 20 September, 2026

    26.5 °C

Climate (2021–2026)

Bicheno (Council Depot) (2km)

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  • Average Low 2021–2026

    10.4 °C

  • Average 2021–2026

    14.3 °C

  • Average High 2021–2026

    18.2 °C
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