Dianas Beach Weather Forecast

    • 6
    • 16

    Showers

    • 9
    • 13

    Showers

    • 9
    • 16

    Shower or two

    • 8
    • 15

    Shower or two

    • 5
    • 16

    Partly cloudy

    • 6
    • 17

    Partly cloudy

    • 6
    • 13

    Partly cloudy

Today 9 Aug St Helens

Cloudy. High chance of showers, most likely later this evening. Winds northerly 15 to 20 km/h becoming light in the late afternoon.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northerly 15 to 20 knots, reaching up to 25 knots offshore in the late afternoon.
Seas
1 to 1.5 metres, increasing to 1.5 to 2 metres offshore.
1st Swell
Northeast to southeasterly below 1 metre, tending north to northeasterly 1 to 1.5 metres by early evening, then increasing to 1.5 to 2 metres later in the evening.
Weather
Cloudy. 80% chance of showers.
Weather Situation
A low deepens over southeastern South Australia today and is forecast to move over western Bass Strait Monday morning. The low moves further east to be off the northeast coast of Tasmania in the evening. A weak ridge is expected to cross over the state during Tuesday before a cold front arrives during Wednesday morning. A high is forecast to move over the mainland directing a westerly flow over Tasmania on Thursday.
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

    8.6 °C
  • Highest 6 August, 2026

    16.3 °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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