Stargazing guide
Stargazing in Retiro, Madrid, Spain
Retiro, Madrid, Spain has an estimated Bortle 4–5 sky (small city). The Milky Way core is highest after dark in June, at about 21°.
How dark the sky is around Retiro, Madrid, Spain, the nearest certified dark-sky places, when the Milky Way core is visible, and the next dark New Moon. Calculated for 40.41°, -3.68°.
Estimated sky glow
Milky Way core
Next New Moon
Dark-sky rating for Retiro
Retiro, Madrid, Spain is a small city (population about 126,058). A place this size typically has a rural to suburban transition: the Milky Way core can be glimpsed on clear, moonless nights. That is an estimate of Bortle class 4–5 from population, not a measurement: the real value depends on the exact spot you observe from.
For a measured reading at any point, open the live Dark Sky map.
Nearest dark-sky places and observatories
No certified dark-sky place or observatory in our registry lies within 150 km of Retiro. Our list only includes genuine, publicly documented sites, so none is shown rather than guessed.
Milky Way season in Retiro
The bright core of the Milky Way stays low, so you need a clear southern or northern horizon. It climbs at least 20° above the horizon during astronomical darkness in April, May, June, July, peaking in June at about 21°.
- The north celestial pole stands 40.4° above the horizon, so stars within 40° of it never set from here.
- About 82.4% of the whole sky rises above the horizon at some point in the year from this latitude.
- The Milky Way's core in Sagittarius culminates about 20.6° up, staying low, so a clear southern horizon matters.
- At 665 m elevation, roughly 8% of the atmosphere's mass is already below you, which measurably reduces extinction near the horizon.
Tonight and aurora
As of October 14, 2026 (UTC) the Moon is a Waxing Crescent at 14% illumination. Aurora at 40.4° latitude generally needs about Kp 8.9.
Nearby places
Stargazing in Retiro: common questions
Is Retiro a good place for stargazing?
Retiro, Madrid, Spain is a small city, so its typical sky is rural to suburban transition: the Milky Way core can be glimpsed on clear, moonless nights (an estimate of Bortle 4–5 from population, not a measurement). No certified dark-sky place or observatory in our registry lies within 150 km, so a dark site means driving away from the city's glow toward the darkest horizon you can reach.
When can you see the Milky Way from Retiro?
From Retiro, Madrid, Spain (40.41°, -3.68°) the Milky Way's bright core climbs at least 20° above the horizon during astronomical darkness in April, May, June, July. It peaks in June, reaching about 21°. Moonlight, cloud and city lights still decide what you actually see.
What is the best night this month for stargazing near Retiro?
The darkest nights fall around the New Moon. As of 2026-10-14 the Moon is a Waxing Crescent at 14% illumination, and the next New Moon is November 9, 2026 (UTC). Pair it with a clear forecast and a site away from town lights.