Dianas Basin Weather Forecast

    • 5
    • 15

    Showers

    • 5
    • 13

    Shower or two

    • 5
    • 13

    Shower or two

    • 3
    • 15

    Mostly sunny

    • 3
    • 14

    Possible shower

    • 6
    • 15

    Showers

    • 2
    • 12

    Shower or two

Today 8 Jul St Helens

Cloudy. Very high chance of showers, becoming less likely later tonight. Winds northerly 20 to 30 km/h tending northwesterly 15 to 25 km/h in the late evening.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northerly 20 to 25 knots, reaching up to 30 knots in the evening. Winds turning northwesterly 15 to 25 knots in the evening.
Seas
2 to 2.5 metres.
1st Swell
Easterly below 1 metre.
Weather
Cloudy. 80% chance of showers.
Weather Situation
A cold front over Tasmania will move away to the east this evening. A second cold front will approach from the west later on Wednesday and is forecast to cross Tasmania during Thursday morning. A southwesterly flow will develop over Tasmania on Thursday afternoon and evening, before a weak cold front is forecast to clip the south of the state on Friday. A high pressure system over mainland Australia is expected to extend a ridge over Tasmania early Saturday, with a northwesterly stream to develop on Saturday afternoon.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dianas Basin Temperature Statistics View More

July Temperature

St Helens Aerodrome (5km)

  • Lowest 1 July, 2025

    1.7 °C

  • Average July

    8.9 °C

  • Highest 6 July, 2025

    15.7 °C

Climate (2020–Present)

St Helens Aerodrome (5km)

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  • Average Low 2020–2025

    9.4 °C

  • Average 2020–2025

    13.3 °C

  • Average High 2020–2025

    18.2 °C
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