San Bernardino Stargazing & Astronomy Report
Light pollution and stargazing locations near San Bernardino
- City
- San Bernardino
- Country
- United States
- Latitude
- 34.1083
- Longitude
- -117.2898
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 17.74
- Bortle class
- Class 9 (Class 9)
- Darkness Quotient
- 21%
- Dataset
- April 2026
Inner city sky
San Bernardino: The Practical Verdict
San Bernardino, a small city in California located east of Los Angeles, experiences high levels of light pollution due to urban sprawl. The city lies in an area classified under severe urban sky conditions, making in-depth stargazing somewhat limited.
From most vantage points within San Bernardino, the Milky Way is not visible due to the light-dominated sky. While the most prominent celestial objects like the Moon, bright planets, and the brightest stars can be seen, visual deep-sky observing is largely impractical. Narrowband imaging is challenging yet possible for capturing the brightest nebulae, but broadband imaging and observing faint objects are severely hindered.
A prime nearby destination for deeper sky observation is Ventura County, located about 225 km west-southwest of San Bernardino. This site provides Bortle Class 2 skies, representing a notable upgrade for astrophotography and deep-sky exploration.
At a Glance
- Overall
- Severe urban sky - This is a severely light-polluted urban sky. Only the Moon, planets, bright stars, and a few specialist targets remain practical.
- Milky Way
- Not visible - The Milky Way is not visible from this sky.
- Best targets from here
- Moon, planets, bright stars, double stars, solar system events, narrowband imaging only with care
- Do not prioritise
- visual deep-sky observing, broadband galaxies, reflection nebulae, widefield Milky Way
- Best nearby upgrade
- Ventura County, California sits about 225 km west south west and reaches Bortle 2, roughly 39x darker.
- Good dark window
- San Bernardino's longest dark windows fall in December and January, with the shortest nights around June and July. Plan deep-sky sessions around the autumn and winter months for the best combination of long nights and true astronomical darkness.
Frequently Asked Questions
Can you see the Milky Way from San Bernardino?
No. San Bernardino is a Bortle Class 9 sky with SQM 17.74, so the Milky Way is not visible from the city. For Milky Way photography, look for a Bortle 4 or darker site.
What Bortle class is San Bernardino?
San Bernardino is Bortle Class 9 (SQM 17.74), a severe urban sky for astronomy.
Is San Bernardino good for stargazing?
Not for serious deep-sky observing. San Bernardino is a severe urban sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.
Is San Bernardino good for astrophotography?
Broadband deep-sky imaging is heavily compromised from San Bernardino and a Bortle 4 or darker site is strongly recommended. Even narrowband imaging is difficult from San Bernardino without careful processing.
What can you observe from San Bernardino?
Primary targets from San Bernardino include Moon, planets, bright stars, double stars, solar system events. Targets such as visual deep-sky observing, broadband galaxies, reflection nebulae are not realistic from this sky.
Where are darker skies near San Bernardino?
The closest meaningfully darker mapped site is San Bernardino County, California, about 40 km east of San Bernardino, reaching Bortle 6.
When is the sky darkest in San Bernardino?
The sky over San Bernardino is darkest around January, December.
Is light pollution in San Bernardino getting better or worse?
Long-term light pollution over San Bernardino has been broadly stable across the available measurements.
north - good
Clean horizon to the north. Star counts remain high near the ground.
north-north-east - good
No visible glow on the north-north-east horizon. Stars are clear down to low elevation in this direction.
north-east - good
No visible glow on the north-east horizon. Stars are clear down to low elevation in this direction.
east-north-east - good
The east-north-east sky shows no obvious glow at ground level. Faint stars are clear at low elevation.
east - fair
The east horizon is mostly dark with a hint of light pollution. Faint stars are accessible above about 10 degrees.
east-south-east - marginal
A soft but obvious glow marks the east-south-east horizon. The lowest 15-20 degrees of sky in this direction are degraded.
south-east - fair
The south-east horizon is mostly dark with a hint of light pollution. Faint stars are accessible above about 10 degrees.
south-south-east - fair
A small artificial brightening near the south-south-east horizon. Star counts in this direction remain high above the lowest elevations.
south - marginal
Moderate brightening on the south horizon. Star counts at low elevation here are reduced.
south-south-west - poor
The south-south-west horizon is bright with artificial light. Only stars brighter than magnitude 3 are visible at low elevation.
south-west - marginal
A soft but obvious glow marks the south-west horizon. The lowest 15-20 degrees of sky in this direction are degraded.
west-south-west - poor
Significant glow on the west-south-west horizon. Avoid this direction for objects below 30 degrees elevation.
west - poor
Bright skyglow dominates the lower west sky. This direction is not suitable for faint-object work at low elevation.
west-north-west - marginal
A soft but obvious glow marks the west-north-west horizon. The lowest 15-20 degrees of sky in this direction are degraded.
north-west - fair
Mild brightening on the north-west horizon. Faint stars at the very lowest elevation are dimmed; otherwise unaffected.
north-north-west - fair
Mild brightening on the north-north-west horizon. Faint stars at the very lowest elevation are dimmed; otherwise unaffected.
zenith - poor
Overhead is dominated by skyglow. Only the brightest stars and planets are clear.
-
San Bernardino County, California
- Direction
- E
- Distance (km)
- 39.6
- SQM
- 19.74
- Bortle
- 6
-
Los Angeles County, California
- Direction
- SW
- Distance (km)
- 172.8
- SQM
- 21.53
- Bortle
- 3
-
Isthmus Road, California
- Direction
- WSW
- Distance (km)
- 134.5
- SQM
- 20.37
- Bortle
- 5
-
Ventura County, California
- Direction
- WSW
- Distance (km)
- 225
- SQM
- 21.71
- Bortle
- 2