Frequently asked
Is tonight good for stargazing in the Sierra de Gredos?
The live score above pulls today's forecast and runs it through StarCast's scoring model, factoring in cloud cover, moon illumination, Bortle class, humidity, and atmospheric transparency. Above 70 is an excellent night. Below 40, conditions are poor. The score updates daily.
What makes the Sierra de Gredos good for astrophotography?
The Sierra de Gredos is a granite mountain range in western-central Spain forming part of the Sistema Central, rising to over 8,500 feet at Pico Almanzor. Located between Madrid and the Extremadura plains, the range sits in a relatively protected zone between urban corridors, with its high peaks and remote valleys achieving Bortle Class 3 to 4 skies — unusually dark for a location within two hours of the Spanish capital. The high granite cirques, glacial lakes (lagunas), and boulder-strewn alpine terrain provide excellent mountain foreground. Spain's continental interior climate delivers a very high frequency of clear nights, particularly in summer and autumn, making the Sierra de Gredos one of the most reliably clear dark sky destinations accessible from central Spain. The elevation also keeps temperatures comfortable for nighttime shooting even in summer.
When is the Milky Way visible in the Sierra de Gredos?
The galactic core is visible from approximately March through October, with May through August the brightest window. Spain's Meseta interior climate means the Sierra de Gredos enjoys an exceptional clear sky frequency — some of the highest in mainland Europe. Summer nights are warm and short but reliably clear. Autumn delivers excellent transparency with cooling temperatures into October and November. Winter nights are cold at altitude but offer superb star transparency and uncrowded mountain access.
