Dianas Beach Weather Forecast

    • 6
    • 15

    Shower or two

    • 11
    • 18

    Showers increasing

    • 11
    • 17

    Shower or two

    • 8
    • 16

    Partly cloudy

    • 8
    • 17

    Mostly sunny

    • 6
    • 17

    Mostly sunny

    • 9
    • 16

    Shower or two

Today 18 Aug St Helens

Cloudy. High chance of showers. Winds northerly 15 to 20 km/h.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northeasterly 15 to 20 knots, reaching up to 25 knots offshore.
Seas
2 metres.
1st Swell
Southerly below 1 metre.
Weather
Cloudy. 60% chance of showers.
Weather Situation
A high pressure system to the east of Tasmania will move away over the Tasman Sea overnight, with a trough to approach during Wednesday and move over the state later Wednesday and early Thursday. Another trough will cross Tasmania later on Thursday, with a west to northwesterly stream expected through Friday and then a cold front to brush the south of the state on Saturday morning.
Graph Plots Open in Graphs

  • 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

    9.9 °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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