Dianas Beach Weather Forecast

    • 11
    • 21

    Cloudy

    • 14
    • 26

    Partly cloudy

    • 15
    • 23

    Showers

    • 11
    • 20

    Partly cloudy

    • 8
    • 21

    Sunny

    • 9
    • 23

    Mostly sunny

    • 11
    • 23

    Possible shower

Today 9 Mar St Helens

Cloudy. Slight chance of a shower. Winds northeasterly 15 to 20 km/h tending northerly 15 to 25 km/h in the middle of the day then becoming light in the evening.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northerly 15 to 20 knots.
Seas
Below 1 metre, increasing to 1 to 1.5 metres around midday.
1st Swell
Southerly below 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Weather
Partly cloudy.
Weather Situation
A high pressure system over eastern Tasmania is expected to move out further into the Tasman Sea today as a weak trough is also forecast to approach and cross the west coast today. The weakened ridge is expected to persist over much of Tasmania on Tuesday. A cold front is forecast to approach and cross Tasmania from the west on Wednesday, followed by a ridge of high pressure extending from a high centred well to the west of the state on Thursday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dianas Beach Temperature Statistics View More

March Temperature

St Helens Aerodrome (5km)

  • Lowest 7 March, 2026

    12.3 °C

  • Average March

    17.6 °C

  • Highest 6 March, 2026

    24.7 °C

Climate (2021–Present)

St Helens Aerodrome (5km)

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  • Average Low 2021–2026

    9.3 °C

  • Average 2021–2026

    13.3 °C

  • Average High 2021–2026

    18.2 °C
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