Swimcart Lagoon Entrance Weather Forecast

    • 8
    • 17

    Partly cloudy

    • 9
    • 16

    Possible early shower

    • 3
    • 16

    Mostly sunny

    • 9
    • 17

    Shower or two

    • 6
    • 14

    Shower or two

    • 7
    • 14

    Shower or two

    • 5
    • 16

    Partly cloudy

Today 21 Aug St Helens

Partly cloudy. Slight chance of a shower, most likely in the early morning. Winds northwesterly 15 to 20 km/h becoming light before dawn then becoming west to northwesterly 15 to 25 km/h in the morning.

East of Flinders Island Coastal Waters

North Flinders Island to St Helens Point
Wind
Northwesterly 15 to 20 knots turning westerly 20 to 25 knots in the early morning. Winds reaching up to 30 knots offshore during the day.
Seas
1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning.
1st Swell
South to southeasterly around 1 metre offshore.
Weather
Partly cloudy. 80% chance of showers offshore, 50% chance elsewhere. The chance of a thunderstorm offshore in the early morning.
Weather Situation
A series of troughs and fronts embedded in a westerly flow are expected to cross Tasmania over the coming days. A high pressure system to the north of Tasmania brings stable conditions from late Saturday before it moves into the Tasman Sea on Sunday. A cold front then approaches Tasmania from the west on Monday, directing a northwesterly flow over the state.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Swimcart Lagoon Entrance Temperature Statistics View More

August Temperature

St Helens Aerodrome (12km)

  • Lowest 1 August, 2026

    3 °C

  • Average August

    10.4 °C

  • Highest 13 August, 2026

    19.2 °C

Climate (2021–2026)

St Helens Aerodrome (12km)

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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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