St Helens Weather Forecast

    • 5
    • 18

    Clear

    • 5
    • 17

    Mostly sunny

    • 5
    • 17

    Mostly sunny

    • 7
    • 17

    Shower or two

    • 11
    • 19

    Shower or two

    • 9
    • 15

    Shower or two

    • 7
    • 14

    Shower or two

Today 20 May St Helens

Clear. Winds southerly 15 to 20 km/h tending southwesterly in the evening then becoming light in the late evening.

East of Flinders Island Coastal Waters

North Flinders Island to St Helens Point
Wind
West to southwesterly 10 to 15 knots, reaching up to 20 knots offshore during the afternoon and evening. Winds tending south to southwesterly in the evening.
Seas
Below 1 metre, increasing to 1 to 1.5 metres offshore.
1st Swell
Northeasterly 1.5 to 2 metres, decreasing to 1.5 metres later in the evening.
Weather
Partly cloudy.
Weather Situation
A high pressure centre near Adelaide extends a ridge of high pressure over Tasmania. The ridge is expected to slowly cross over Tasmania during Thursday and Friday, bringing mostly settled weather to the state. The high is then forecast to move to the east of Tasmania later Friday as a cold front approaches from the west during Saturday, and crosses over the west later Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

St Helens Temperature Statistics View More

May Temperature

St Helens Aerodrome (3km)

  • Lowest 8 May, 2026

    6.1 °C

  • Average May

    13.7 °C

  • Highest 1 May, 2026

    24.9 °C

Climate (2021–Present)

St Helens Aerodrome (3km)

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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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