Diamond Island Weather Forecast

    • 9
    • 19

    Mostly clear

    • 10
    • 22

    Sunny

    • 11
    • 28

    Mostly sunny

    • 14
    • 23

    Shower or two developing

    • 12
    • 17

    Shower or two

    • 13
    • 23

    Showers

    • 14
    • 20

    Showers increasing

Today 15 Dec East Coast

Mostly clear. Winds westerly 15 to 25 km/h.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Southwesterly 15 to 20 knots, reaching up to 25 knots offshore.
Seas
1 to 1.5 metres, increasing to 1.5 to 2 metres offshore.
1st Swell
Southerly 1 to 2 metres inshore, increasing to 2.5 to 4 metres offshore.
Weather
Partly cloudy.
Weather Situation
A high pressure system to the northwest will cross through Bass Strait on Tuesday and will continue to extend a ridge over the state as the high settles in the Tasman Sea on Wednesday. A trough will cross over the state on Thursday with broad area of low pressure developing off the west coast on Friday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Diamond Island Temperature Statistics View More

December Temperature

Bicheno (Council Depot) (2km)

  • Lowest 1 December, 2025

    5.5 °C

  • Average December

    16.1 °C

  • Highest 4 December, 2025

    32 °C

Climate (2020–Present)

Bicheno (Council Depot) (2km)

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  • Average Low 2020–2025

    10.4 °C

  • Average 2020–2025

    14.2 °C

  • Average High 2020–2025

    18.1 °C
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