Dianas Basin Weather Forecast

    • 3
    • 14

    Sunny

    • 5
    • 13

    Shower or two

    • 7
    • 13

    Cloudy

    • 4
    • 14

    Partly cloudy

    • 4
    • 14

    Partly cloudy

    • 3
    • 13

    Partly cloudy

    • 3
    • 15

    Shower or two

Today 22 Jun St Helens

Sunny. Light winds.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
West to northwesterly 10 to 15 knots decreasing to about 10 knots in the late afternoon then increasing to 10 to 15 knots in the late evening.
Seas
Below 1 metre.
1st Swell
Southerly around 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Weather
Mostly sunny.
Weather Situation
A northwesterly airstream flows over Tasmania this evening as a ridge gradually moves to the east and a cold front approaches from the west. The cold front is expected to reach southwest Tasmania early Tuesday then cross during the day, bringing a cooler southerly flow to the state. A high pressure centre then approaches from the west on Wednesday, extending a ridge over Tasmania. The ridge remains in place during Thursday and Friday, bringing mostly settled weather to the state.
Graph Plots Open in Graphs
  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dianas Basin Temperature Statistics View More

June Temperature

St Helens Aerodrome (5km)

  • Lowest 15 June, 2026

    2.9 °C
  • Average June

    11.2 °C
  • Highest 10 June, 2026

    18.4 °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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