Dianas Beach Weather Forecast

    • 8
    • 14

    Showers

    • 5
    • 13

    Shower or two

    • 3
    • 15

    Mostly sunny

    • 5
    • 16

    Mostly sunny

    • 5
    • 16

    Mostly sunny

    • 5
    • 16

    Mostly sunny

    • 5
    • 16

    Mostly sunny

Today 13 Jul St Helens

Cloudy. High chance of showers, becoming less likely in the evening. Winds northwesterly 25 to 40 km/h tending westerly 20 to 30 km/h in the late evening.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northwesterly 25 to 30 knots, reaching up to 35 knots offshore in the late morning. Winds turning westerly 20 to 30 knots in the late evening.
Seas
1 to 2 metres, increasing to 2.5 to 3 metres offshore.
1st Swell
Northwest to southwesterly below 1 metre inshore, increasing to 1 to 2 metres offshore.
Weather
Partly cloudy. 70% chance of showers. The chance of a thunderstorm offshore from the late morning.
Weather Situation
A strong and gusty westerly airstream prevails, with a cold front embedded in the flow crossing Tasmania today, bringing much colder conditions to the state. Another weaker cold front is then expected to cross during Wednesday, bringing fresh southwesterly winds. A high pressure ridge will develop over Tasmania on Thursday, directing west to northwesterly flow.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dianas Beach Temperature Statistics View More

July Temperature

St Helens Aerodrome (5km)

  • Lowest 5 July, 2026

    4.2 °C

  • Average July

    9.5 °C

  • Highest 1 July, 2026

    16.7 °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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