Swimcart Lagoon Entrance Weather Forecast
- 9
- 16
Rain
- 9
- 19
Partly cloudy
- 7
- 16
Partly cloudy
- 5
- 19
Sunny
- 6
- 15
Partly cloudy
- 5
- 20
Sunny
- 4
- 22
Sunny
Today 5 Sep St Helens
Cloudy. Very high chance of rain, becoming less likely late this afternoon and evening. The chance of a thunderstorm in the late morning. Winds northerly 20 to 30 km/h tending west to northwesterly in the early afternoon then tending southwesterly 15 to 20 km/h in the late evening.
East of Flinders Island Coastal Waters
North Flinders Island to St Helens Point- Wind
- Northerly 15 to 25 knots, reaching up to 30 knots during the day. Winds turning west to northwesterly 20 to 25 knots in the early afternoon.
- Seas
- 1.5 to 2 metres, increasing to 2 to 3 metres around midday.
- 1st Swell
- Southerly below 1 metre inshore, increasing to 1 to 2 metres offshore later in the evening.
- Weather
- Cloudy. Near 100% chance of showers. The chance of a thunderstorm from late this morning.
- Weather Situation
- A low pressure system and associated cold front is approaching Tasmania from the west, directing a northwesterly airstream over the state. This low is expected to cross Tasmania during today, directing the airstream more northerly. A west to southwesterly airstream is then expected in the wake of the low on Saturday evening. A series of weaker cold fronts embedded in the westerly flow are then forecast to cross the state in the following days.
Swimcart Lagoon Entrance Temperature Statistics View More
September Temperature
St Helens Aerodrome (12km)
Lowest 4 September, 2026
6.1 °CAverage September
12.3 °CHighest 1 September, 2026
17.3 °C
Climate (2021–2026)
St Helens Aerodrome (12km)
Average Low 2021–2026
9.4 °CAverage 2021–2026
13.4 °CAverage High 2021–2026
18.3 °C