Dianas Beach Weather Forecast

    • 5
    • 17

    Partly cloudy

    • 7
    • 16

    Mostly sunny

    • 10
    • 16

    Cloudy

    • 11
    • 15

    Shower or two

    • 5
    • 12

    Sunny

    • 6
    • 15

    Partly cloudy

    • 9
    • 15

    Mostly sunny

Today 19 Jul St Helens

Partly cloudy. Light winds becoming northwesterly 15 to 20 km/h in the late evening.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
North to northwesterly about 10 knots increasing to 10 to 15 knots in the late afternoon. Winds reaching up to 20 knots offshore in the evening.
Seas
Below 1 metre, increasing to 1 to 1.5 metres offshore by early evening.
1st Swell
Southerly 1 to 1.5 metres inshore, increasing to 1 to 2 metres offshore.
Weather
Partly cloudy.
Weather Situation
A west to northwesterly airstream will prevail over the state until Monday as a near stationary high pressure centre over Victoria extends a weak ridge over Tasmania. A weak trough is expected to move over the west Monday evening, and the rest of the state during Tuesday, before a strong cold front is forecast to arrive Wednesday afternoon.
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 11 July, 2026

    3.4 °C
  • Average July

    9.6 °C
  • Highest 16 July, 2026

    17.2 °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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