Dianas Beach Weather Forecast

    • 6
    • 17

    Mostly sunny

    • 7
    • 18

    Shower or two. Becoming windy

    • 8
    • 16

    Partly cloudy

    • 11
    • 17

    Shower or two. Becoming windy

    • 7
    • 17

    Shower or two

    • 10
    • 16

    Showers

    • 7
    • 15

    Possible shower

Today 31 Aug St Helens

Mostly sunny. Light winds.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
South to southwesterly 10 to 15 knots shifting northeasterly during the morning then tending northwest to northeasterly in the evening. Winds reaching up to 20 knots offshore during the morning and again in the late evening.
Seas
1 to 2 metres, decreasing to 1 metre during the morning.
1st Swell
Southerly 1 to 1.5 metres inshore, increasing to 1.5 to 2.5 metres offshore.
Weather
Mostly sunny.
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 23 August, 2026

    2.5 °C

  • Average August

    10.9 °C

  • Highest 29 August, 2026

    19.4 °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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