Dianas Beach Weather Forecast

    • 11
    • 22

    Clear

    • 14
    • 27

    Becoming windy. Sunny

    • 11
    • 20

    Partly cloudy

    • 11
    • 22

    Possible shower

    • 8
    • 20

    Partly cloudy

    • 11
    • 19

    Shower or two

    • 10
    • 21

    Cloudy

Today 3 Dec St Helens

Clear. Winds northwesterly 25 to 30 km/h.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northwesterly 15 to 20 knots, reaching up to 30 knots offshore during the afternoon and evening.
Seas
2 to 2.5 metres.
1st Swell
Southerly below 1 metre.
Weather
Clear.
Weather Situation
A high pressure system over the Tasman Sea directs a northwesterly flow over the state, strengthening ahead of a weak cold front to cross Tasmania during Thursday. A weak ridge passes over the state on Friday, before another cold front is forecast to cross the state on Saturday. A westerly flow is then expected to develop over Tasmania on Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dianas Beach Temperature Statistics View More

December Temperature

St Helens Aerodrome (5km)

  • Lowest 2 December, 2025

    6.6 °C

  • Average December

    11.1 °C

  • Highest 1 December, 2025

    17.2 °C

Climate (2020–Present)

St Helens Aerodrome (5km)

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  • Average Low 2020–2025

    9.3 °C

  • Average 2020–2025

    13.3 °C

  • Average High 2020–2025

    18.2 °C
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