Tresa – Water level, Discharge & Water temperature

Tresa is measured at 3 measuring stations and touches Lake Lugano.

Current situation

Tresa at Ponte Tresa (outflow) is currently flowing at 5.4 m³/s. Compared with yesterday’s daily average (Coordinated Universal Time, UTC): largely stable; currently below the 30-day median.

Discharge5.4 m³/sOct 4, 2026, 3:20 AM

Water level267.94 m a.s.l.Oct 4, 2026, 3:20 AM

Water temperature21.7 °COct 4, 2026, 3:20 AM

Reference: 30 available daily means from the last 30 complete days (Coordinated Universal Time, UTC), compared with the current individual value. Being close to the median does not describe the spread of values. Gaps can affect daily means. This is neither a seasonal normal nor an official danger level.

How this assessment is made

Reading and sourceBundesamt für Umwelt (BAFU) · 18 minutes ago

Basis of comparisonCurrent reading, previous day and available 30-day daily means from the same reference station.

CalculationSeepegel uses the highest-flowing current reference station; stations along a river are not added together.

Tresa, Ponte Tresa (outflow)

Outflow from the lake: this value describes the outflow station.

Einziger Ausfluss des Luganersees, an der Grenze zu Italien (Station BAFU Nr. 2167)

Measurement time: Oct 4, 2026, 3:20 AM

Bundesamt für Umwelt (BAFU) ↗

Discharge over the last 30 days

One line per station. Differences are not a direct inflow balance: measurement times, travel times, storage, withdrawals and tributaries can affect the values.

Ponte Tresa (Abfluss)

Water level, last 30 days

One line per station. Elevation levels and local centimetre gauges are shown separately.

Ponte Tresa (Abfluss)

Water temperature, last 30 days

One line per station with a temperature probe.

Ponte Tresa, Rocchetta (Temperatur)

FOEN forecast for the Ponte Tresa (outflow) station. Not available for every station.

The forecast value is expected to rise by about 0.7 m³/s across the 5 displayed forecast days.

Today10/045.5m³/s

Mon10/055.5m³/s

Tue10/065.5m³/s

Wed10/075.5m³/s

Thu10/086.0m³/s

Forecast

Source: FOEN forecast

Median
Min./Max.
Measured

The line shows the median of the FOEN model forecasts at each timestamp; the band shows their minimum and maximum. Daily cards average the available hourly medians, which is not a daily median. A wider band means greater spread between model paths, not guaranteed upper or lower limits. Partial days may contain fewer forecast values.

What has changed?

8 days ago

↑Tresa, Ponte Tresa (outflow): reading rose by +3.9 m³/s

8 days ago

↑Tresa, Ponte Tresa (outflow): reading rose by +0.12 m a.s.l.

9 days ago

↓Tresa, Ponte Tresa (outflow): reading fell by -2.2 m³/s

9 days ago

↓Tresa, Ponte Tresa (outflow): reading fell by -0.07 m a.s.l.

11 days ago

↑Tresa, Ponte Tresa (outflow): reading rose by +2.4 m³/s

11 days ago

↑Tresa, Ponte Tresa (outflow): reading rose by +0.09 m a.s.l.

Readings and stations

All recorded quantities with measurement time, data quality and official source.

Stations on the map

Each marker opens the corresponding station details.

Connected lakes

Lake Lugano

Water knowledge

Understanding Tresa

Tresa: this overview puts the available stations and measurements in context. The exact location matters, not just the water body's name.

This overview includes 3 monitoring stations for water level, discharge, and water temperature. Not every station provides every measurement. Track changes at the same station, checking the timestamp, unit and source notes. Related waters in this overview: Lake Lugano.

Discharge in m³/s is a volume per second, not the speed of the current. Station comparisons must account for location, measurement time and water travel time. A higher reading is neither automatically a flood warning nor an indication that the river is navigable.