Saint Helens Marina Weather Forecast

    • 14
    • 27

    Possible morning shower

    • 12
    • 22

    Showers increasing

    • 13
    • 22

    Shower or two

    • 12
    • 20

    Shower or two clearing

    • 11
    • 21

    Partly cloudy

    • 9
    • 20

    Partly cloudy

    • 9
    • 19

    Partly cloudy

Today 20 Dec St Helens

Partly cloudy. Medium chance of drizzle and showers this morning. The chance of a thunderstorm in the early morning. Light winds becoming northwesterly 20 to 30 km/h in the morning then becoming light in the late evening.

East of Flinders Island Coastal Waters

North Flinders Island to St Helens Point
Wind
North to northeasterly 10 to 15 knots shifting westerly 15 to 25 knots during the morning. Winds reaching up to 30 knots in the late afternoon.
Seas
1 to 1.5 metres, increasing to 1.5 to 2.5 metres around midday.
1st Swell
Easterly 1 to 1.5 metres, tending northeasterly around 1 metre around midday.
Weather
The chance of drizzle near Eddystone Point early this morning with reduced visibility. 50% chance of showers this morning. The chance of a thunderstorm this morning. Mostly sunny afternoon.
Weather Situation
A broad low pressure system lies to the west of Tasmania and is forecast to deepen and slowly move south east over Tasmania during Saturday and clear the State to the south on Sunday. A second, more intense, low pressure system is then forecast to move across Bass Strait Sunday and clear to the east Monday morning. A ridge of high pressure then extends across Tasmania and persists Monday and Tuesday to direct a westerly flow.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Saint Helens Marina Temperature Statistics View More

December Temperature

St Helens Aerodrome (2km)

  • Lowest 2 December, 2025

    6.6 °C
  • Average December

    16 °C
  • Highest 17 December, 2025

    29.5 °C

Climate (2020–Present)

St Helens Aerodrome (2km)

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  • Average Low 2020–2025

    9.3 °C
  • Average 2020–2025

    13.3 °C
  • Average High 2020–2025

    18.2 °C
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