Our model puts Belém at around 66 dB(A) as a day-evening-night average, which reads as loud. Levels range from about 58 to 74 dB(A) between its quietest and loudest streets.

Is Belém quiet at night?

Modelled night levels average around 56 dB(A), lively, about as loud as a nearby conversation. The quietest hour is typically around 03:00.

What is the main noise source in Belém?

Road traffic dominates, carrying about 87% of the modelled sound energy, followed by rail and tram.

When is Belém loudest?

The loudest hour is typically around 17:00, the calmest around 03:00.

Noise in Belém

Lisbon · modelled noise guide

Belém averages around 66 dB(A) over the day-evening-night cycle in our model, which reads as loud. Nights average around 56 dB(A). Monuments, museums and riverside lawns. The Marginal avenue and the Cascais rail line run the full length of the riverfront.

45 quiet556575+ very loud

Day-evening-night (Lden)

66 dB(A)

Night average (Ln)

56 dB(A)

Main source

road traffic
87% of sound energy

Quiet pockets

0% below 55 dB(A)

Across 13 sampled spots the average ranges from 58 to 74 dB(A): a moderate spread between its calm and busy streets. The loudest hour is typically around 17:00 and the calmest around 03:00.

Open the live noise map of Belém Or check a specific address for a free room-by-room noise report, hour by hour.

Questions people ask

How noisy is Belém?: Our model puts Belém at around 66 dB(A) as a day-evening-night average, which reads as loud. Levels range from about 58 to 74 dB(A) between its quietest and loudest streets.
Is Belém quiet at night?: Modelled night levels average around 56 dB(A), lively, about as loud as a nearby conversation. The quietest hour is typically around 03:00.
What is the main noise source in Belém?: Road traffic dominates, carrying about 87% of the modelled sound energy, followed by rail and tram.
When is Belém loudest?: The loudest hour is typically around 17:00, the calmest around 03:00.

Nearby areas

What helps against the noise

Cheap fixes first (earplugs, masking sound), structural ones second (acoustic glazing takes 5 to 10 dB off the room behind it). Our short, independent picks:

Links may earn Urbient a commission. Recommendations never affect the noise estimates.

How these numbers are made. Urbient models noise from OpenStreetMap geometry: roads, rail and pedestrian streets as line sources with per-street traffic adjustments, venues as point sources, aircraft corridors calibrated against the official 2021 strategic noise map, and shielding from 466,000 building footprints. The figures here average 13 sample points spread over the area; any single address can sit well above or below them. This is a modelled estimate and never a certified measurement under DL 9/2007. Official maps: CML and APA.