Diamond Island Weather Forecast

    • 9
    • 19

    Partly cloudy

    • 13
    • 22

    Shower or two

    • 11
    • 17

    Shower or two

    • 8
    • 16

    Mostly sunny

    • 8
    • 19

    Partly cloudy

    • 11
    • 19

    Showers

    • 7
    • 15

    Shower or two

Today 14 Sep East Coast

Partly cloudy. Slight chance of a shower about higher ground, most likely this morning. Near zero chance of rain elsewhere. Winds northwesterly 25 to 35 km/h. Daytime maximum temperatures between 13 and 18.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northwesterly 15 to 25 knots, reaching up to 30 knots offshore in the late morning and afternoon.
Seas
1.5 to 2.5 metres.
1st Swell
Southerly below 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Weather
Partly cloudy.
Weather Situation
A northwesterly airstream builds over Tasmania as a high pressure system moves eastward over the northern Tasman Sea today A series of troughs and cold fronts are expected to cross the state during Monday and Tuesday, before a westerly airstream builds on Wednesday as a high lies over Victoria.
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 6 September, 2025

    3 °C

  • Average September

    12.4 °C

  • Highest 8 September, 2025

    20.2 °C

Climate (2020–Present)

Bicheno (Council Depot) (2km)

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  • Average Low 2020–2025

    10.5 °C

  • Average 2020–2025

    14.3 °C

  • Average High 2020–2025

    18.1 °C
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