Concord Stargazing & Astronomy Report
Light pollution and stargazing locations near Concord
- City
- Concord
- Country
- United States
- Latitude
- 37.9780
- Longitude
- -122.0311
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 18.34
- Bortle class
- Class 8 (Class 8)
- Darkness Quotient
- 26%
- Dataset
- March 2026
City sky
Stargazing in Concord
Concord is a substantial suburban city in the East Bay of Northern California, part of the wider San Francisco Bay Area and shaped by the dense urban fabric of the region.
The city generally experiences High Light Pollution, with a Darkness Quotient of 26% — making it brighter than good rural locations and placing it among the more light-polluted urban areas for astronomy.
In practical terms, the most realistic targets from within the city are the Moon, bright planets, double stars and the brightest open clusters. A few showpiece deep-sky objects can still be attempted with care, but faint galaxies, nebulae and the Milky Way are largely overwhelmed by the skyglow.
Meaningfully darker skies are not close at hand, and a proper improvement takes a fair drive. The nearest reasonable step up is about 70 kilometres to the west, near Near Marin County, California, where conditions improve to a good rural-suburban transition for observing.
The map shows Concord embedded within a broad, continuous zone of strong urban brightness, with the central Bay Area appearing as an extended mass of yellow, orange, red and pink rather than a single isolated light dome. That pattern tells you the city's glow is reinforced by surrounding settlements in several directions, so the sky does not fall away quickly once you leave the centre.
The darkest tones on the crop sit well away from the main urban core, especially offshore to the west and across the more sparsely lit interior to the east and north-east. Around Concord itself, the nearby colours remain mostly bright greens through reds, which fits a city where local observing is dominated by widespread regional skyglow rather than just one concentrated source.
Compared with its surroundings, Concord is bright but not uniquely so; it sits inside a larger metropolitan lighting basin. The more promising escape routes are where the colour bands thin out toward darker blues and greys, particularly to the west-north-west and north-west, while routes through the southern and inner eastern parts of the map stay noticeably more illuminated for longer.
What the overhead sky is like
Looking straight up from Concord, the zenith is bright by astronomical standards, consistent with a Bortle 8 city sky. The background never becomes properly black, and contrast on faint objects is limited even when transparency is good.
The brightest constellations remain easy enough to trace, and the main seasonal star patterns are still recognisable overhead. What you lose is the finer structure between them: weaker stars thin out, dark lanes vanish, and the sky tends to look washed with a pale urban glow rather than richly star-filled.
For visual observing, this means overhead targets fare better than objects lower down in the murkier horizons, but even at the zenith faint deep-sky work is heavily compromised. The city sky supports casual and planetary observing much better than serious faint-object hunting.
north - marginal
About 15 kilometres north of Concord, the sky is still only marginal for astronomy, at around Bortle 6. It does improve steadily in this direction, with good darker conditions appearing at roughly 100 kilometres, though genuinely very dark skies are not reached within the sampled range.
north-north-east - fair
Around 15 kilometres north-north-east, conditions are fair by urban standards, at Bortle 5. This direction improves gradually, but the real dark-sky breakthrough does not arrive until about 200 kilometres out, where the sky becomes excellent.
north-east - marginal
At roughly 15 kilometres to the north-east, the sky remains marginal at Bortle 6. Conditions become much stronger only with a long journey, with genuinely dark rural sky appearing around 200 kilometres from the city.
east-north-east - poor
Around 15 kilometres east-north-east, the sky is poor for stargazing, at Bortle 8, showing how stubborn the local glow remains in that direction. It improves further out, but truly dark conditions only arrive at about 200 kilometres.
east - marginal
About 15 kilometres east of Concord, conditions are still marginal at Bortle 6. There is a useful improvement farther out, with good skies appearing around 100 kilometres away and excellent darkness by about 200 kilometres.
east-south-east - marginal
At around 15 kilometres east-south-east, the sky is marginal, sitting at Bortle 6. This route does eventually lead to much darker ground, but not until roughly 200 kilometres from the city.
south-east - fair
Around 15 kilometres to the south-east, the sky is fair at Bortle 5, which is one of the more encouraging nearby directions. It improves to good rural-suburban observing at about 100 kilometres, though genuinely dark skies are not reached within the sampled radius in this direction.
south-south-east - marginal
About 15 kilometres south-south-east of Concord, the sky remains marginal at Bortle 6. Some improvement is possible farther out, but genuinely dark skies are not reached within the sampled radius in this direction.
south - marginal
At roughly 15 kilometres south, conditions are still marginal at Bortle 6. The brighter urban influence lingers for a long way, and truly dark skies only turn up at around 200 kilometres.
south-south-west - marginal
Around 15 kilometres south-south-west, the sky is marginal at Bortle 6. A worthwhile improvement appears by about 100 kilometres, and excellent darkness is reachable only with a much longer run of around 200 kilometres.
south-west - marginal
About 15 kilometres south-west of Concord, the sky is still marginal at Bortle 6. This direction improves sharply farther out, with good dark rural conditions appearing around 100 kilometres away and even better sky beyond that.
west-south-west - marginal
At roughly 15 kilometres west-south-west, the sky remains marginal at Bortle 6. A substantial improvement arrives at about 100 kilometres, where the sky becomes properly dark for serious deep-sky observing.
west - marginal
Around 15 kilometres west, the sky is marginal at Bortle 6. This is one of the more rewarding escape directions, with clearly darker conditions available at about 100 kilometres and excellent darkness farther beyond.
west-north-west - marginal
About 15 kilometres west-north-west of the city, the sky is marginal at Bortle 6. It improves well with distance, reaching good dark-sky territory at around 100 kilometres and excellent conditions farther out.
north-west - poor
At around 15 kilometres north-west, the sky is still poor at Bortle 7, so nearby observing remains heavily affected by urban glow. This direction does improve later on, but genuinely dark sky is only reached at about 200 kilometres.
north-north-west - marginal
Around 15 kilometres north-north-west, the sky is marginal at Bortle 6. A much better result appears by about 100 kilometres, where the sky reaches good dark rural quality.
zenith - poor
Straight overhead in Concord, the zenith is poor for deep-sky observing, corresponding to a Bortle 8 sky and an SQM of 18.34. You can still pick out the brighter constellations and obvious stars, but the sky background is washed out, the Milky Way is absent, and many familiar patterns look thinner than they would under rural darkness.
-
Near Sonoma County, California
- Direction
- NW
- Distance (km)
- 140.9
- SQM
- 21.46
- Bortle
- 3
Milky Way visible, broadband DSO imaging
-
Near Tehama County, California
- Direction
- WNW
- Distance (km)
- 263.6
- SQM
- 21.34
- Bortle
- 3
Milky Way visible, broadband DSO imaging
-
Near Marin County, California
- Direction
- W
- Distance (km)
- 69.2
- SQM
- 21.00
- Bortle
- 4
Bright nebulae, galaxies, narrowband imaging
Genuinely darker skies require a meaningful drive from Concord rather than a quick hop out of town.
The nearest reasonable dark-sky improvement is about 70 kilometres to the west at Near Marin County, California, where conditions reach Bortle 4. If you are willing to go farther, around 140 kilometres to the north-west near Near Sonoma County, California brings a more distinctly dark rural sky at Bortle 3.
-
Within 100 km
- Place
- Near Marin County, California
- Direction
- W
- Distance (km)
- 69.2
- SQM
- 21.00
- Bortle
- 4
-
Within 200 km
- Place
- Near Sonoma County, California
- Direction
- NW
- Distance (km)
- 140.9
- SQM
- 21.46
- Bortle
- 3
-
Within 500 km
- Place
- Near Tehama County, California
- Direction
- WNW
- Distance (km)
- 263.6
- SQM
- 21.34
- Bortle
- 3
Long-term brightness trend
Concord's sky has been fairly stable overall across the available record, but the long-term direction is slightly brighter rather than darker. The measured trend is a small decline from 18.45 SQM at the start of the series to 18.34 SQM in the latest reading.
Across 75 datasets, the mean value is 18.5 SQM, with the full spread running from 18.3 to 18.72 SQM. In other words, conditions fluctuate a little from one period to another, but the city has remained consistently bright for astronomy throughout the record.
The trend slope of -0.0175 SQM per year is modest, so this is not a dramatic deterioration. Still, it suggests that observers in Concord are not seeing any meaningful long-term recovery in night-sky darkness.
From Concord itself, the safest and most rewarding targets are bright, high-contrast objects. The Moon, planets and double stars cope well with the city glow, and the brightest open clusters can still give pleasing views.
A few headline deep-sky objects are possible if you keep expectations realistic, especially bright nebulae such as M42 and the brightest globular clusters. These are usually better when placed high in the sky and viewed on transparent, moonless nights.
For the Milky Way, faint galaxies, broad nebulae and the full impact of meteor showers, you will want to leave the city behind. Those targets depend heavily on dark background sky, which Concord does not provide from within the urban area.
- Moon
- planets
- double stars
- brightest open clusters
- bright nebulae such as M42
- the brightest globular clusters
- Milky Way
- faint galaxies
- broadband nebulae
- meteor showers
Can you see stars from Concord?
Yes — you can still see plenty of the brighter stars and the main constellation patterns from Concord. What drops away are the fainter background stars that make the sky look rich and detailed from darker places.
Can you see the Milky Way from Concord?
In normal conditions from within the city, the Milky Way is not realistically visible. Concord's sky is bright enough that its faint glow is overwhelmed.
What Bortle class is Concord?
Concord is Bortle Class 8, which is a city sky. That means bright objects still show well, but faint deep-sky observing is heavily restricted.
What is the SQM in Concord?
The measured sky brightness is 18.34 SQM. That is firmly on the bright urban side for astronomy.
Where are the nearest darker skies?
The nearest clearly better option in the supplied locations is Near Marin County, California, about 69.2 kilometres to the west, where conditions reach Bortle 4. For darker still skies, Near Sonoma County, California lies about 140.9 kilometres to the north-west at Bortle 3.
Is Concord good for astrophotography?
It is workable for the Moon, planets and some brighter deep-sky targets with the right filters and processing, but it is not ideal for faint wide-field subjects. If you want cleaner background sky and stronger contrast, a darker site will make a big difference.
How far do you need to drive from Concord for dark skies?
For a reasonable improvement, expect to drive about 70 kilometres to reach Bortle 4 conditions near Near Marin County, California. For more convincingly dark Bortle 3 skies, the nearest listed option is about 140.9 kilometres away near Near Sonoma County, California.