Dianas Beach Weather Forecast

    • 8
    • 17

    Partly cloudy

    • 9
    • 16

    Early shower or two

    • 3
    • 16

    Mostly sunny

    • 9
    • 17

    Possible shower

    • 8
    • 14

    Shower or two

    • 8
    • 15

    Shower or two

    • 5
    • 17

    Mostly sunny

Today 21 Aug St Helens

Partly cloudy. Winds northwesterly 15 to 20 km/h.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northwesterly 15 to 20 knots, reaching up to 30 knots offshore.
Seas
1 to 1.5 metres, increasing to 1.5 to 2.5 metres offshore.
1st Swell
Northerly around 1 metre.
Weather
Mostly clear.
Weather Situation
A cold front embedded in a vigorous westerly stream will approach and cross Tasmania on Saturday morning, with high pressure system to build to the north of the state and extend a ridge over Tasmania in the evening. The high will move slowly move to the north of Tasmania on Sunday and over the northern Tasman Sea by Sunday evening, with another cold front to approach and cross the state on Monday. On Tuesday a ridge of high pressure is expected to extend over Tasmania, with a low pressure system to move from central Australia over southern New South Wales.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dianas Beach Temperature Statistics View More

August Temperature

St Helens Aerodrome (5km)

  • Lowest 1 August, 2026

    3 °C
  • Average August

    10.5 °C
  • Highest 13 August, 2026

    19.2 °C

Climate (2021–2026)

St Helens Aerodrome (5km)

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  • Average Low 2021–2026

    9.4 °C
  • Average 2021–2026

    13.4 °C
  • Average High 2021–2026

    18.3 °C
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