Southend-on-Sea Stargazing & Astronomy Report
Light pollution and stargazing locations near Southend-on-Sea
- City
- Southend-on-Sea
- Country
- United Kingdom
- Latitude
- 51.5362
- Longitude
- 0.7127
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 19.06
- Bortle class
- Class 7 (Class 7)
- Darkness Quotient
- 34%
- Dataset
- April 2026
Suburban/urban transition
Southend-on-Sea: The Practical Verdict
Southend-on-Sea is a small city on England's south-east coast with suburban surroundings. Unfortunately, it suffers from high light pollution, significantly limiting observations. The Milky Way is not visible, and deep-sky observing is impractical here.
From this level of brightness, stargazing efforts are best focused on the Moon, planets, and double stars. Some bright open clusters may also be enjoyable, though narrowband imaging of emission nebulae is only viable with careful planning and processing. Visual or photographic attempts on the Milky Way and faint nebulae should be avoided due to the poor sky quality.
For astronomers seeking better views, a meaningfully darker sky is accessible about 65 km to the north-east, which provides Bortle 4 conditions with improved visibility for deep-sky objects and Milky Way photography.
At a Glance
- Overall
- Poor urban/suburban sky - This is a poor sky for astronomy. The Moon, planets, and a few bright objects remain viable, but deep-sky work is difficult.
- Milky Way
- Not visible - The Milky Way is not realistically visible from this level of light pollution.
- Best targets from here
- Moon, planets, bright double stars, bright open clusters, narrowband imaging with careful processing
- Do not prioritise
- visual deep-sky observing, broadband galaxies, reflection nebulae, Milky Way photography
- Best nearby upgrade
- 63 km NE sits about 63 km north east and reaches Bortle 4, roughly 5.1x darker.
- Moderate dark window
- Southend-on-Sea'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 Southend-on-Sea?
No. Southend-on-Sea is a Bortle Class 7 sky with SQM 19.06, 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 Southend-on-Sea?
Southend-on-Sea is Bortle Class 7 (SQM 19.06), a poor urban/suburban sky for astronomy.
Is Southend-on-Sea good for stargazing?
Not for serious deep-sky observing. Southend-on-Sea is a poor urban/suburban sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.
Is Southend-on-Sea good for astrophotography?
Broadband deep-sky imaging is heavily compromised from Southend-on-Sea and a Bortle 4 or darker site is strongly recommended. Narrowband imaging of bright emission nebulae remains viable from Southend-on-Sea with appropriate Ha or OIII filters.
What can you observe from Southend-on-Sea?
Primary targets from Southend-on-Sea include Moon, planets, bright double stars, bright open clusters, narrowband imaging with careful processing. Targets such as visual deep-sky observing, broadband galaxies, reflection nebulae are not realistic from this sky.
Where are darker skies near Southend-on-Sea?
The closest meaningfully darker mapped site is 10 km NE, about 10 km north east of Southend-on-Sea, reaching Bortle 5.
When is the sky darkest in Southend-on-Sea?
The sky over Southend-on-Sea is darkest around January, December. Significant summer limitation: around 59 nights per year have no true astronomical darkness.
Is light pollution in Southend-on-Sea getting better or worse?
Long-term light pollution over Southend-on-Sea has been broadly stable across the available measurements.
north - good
Dark horizon to the north. Faint stars and extended objects in this direction behave much as they do overhead.
north-north-east - good
Dark sky in the north-north-east direction with no obvious skyglow. Suitable for faint-object work at low elevation.
north-east - good
The north-east sky is dark to the horizon. Faint targets are accessible at all elevations here.
east-north-east - good
Dark sky in the east-north-east direction with no obvious skyglow. Suitable for faint-object work at low elevation.
east - good
The east sky is dark to the horizon. Faint targets are accessible at all elevations here.
east-south-east - good
The east-south-east horizon is dark. Faint stars are visible close to the ground.
south-east - good
Dark horizon to the south-east. Faint stars and extended objects in this direction behave much as they do overhead.
south-south-east - fair
A trace of skyglow near the south-south-east horizon. Stars are clear throughout this direction except very close to the ground.
south - good
The south horizon is dark. Faint stars are visible close to the ground.
south-south-west - good
Dark sky in the south-south-west direction with no obvious skyglow. Suitable for faint-object work at low elevation.
south-west - good
The south-west horizon is dark. Faint stars are visible close to the ground.
west-south-west - fair
A trace of skyglow near the west-south-west horizon. Stars are clear throughout this direction except very close to the ground.
west - fair
The west sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
west-north-west - fair
Faint glow on the west-north-west horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
north-west - good
Dark sky in the north-west direction with no obvious skyglow. Suitable for faint-object work at low elevation.
north-north-west - good
No noticeable light pollution to the north-north-west. The sky in this direction is dark to the horizon.
zenith - fair
Overhead is brighter than natural but still usable. The Milky Way is absent; brighter Messier objects remain accessible.
-
10 km NE
- Direction
- NE
- Distance (km)
- 9.6
- SQM
- 20.52
- Bortle
- 5
-
46 km SSE
- Direction
- SSE
- Distance (km)
- 45.7
- SQM
- 20.75
- Bortle
- 5
-
43 km SE
- Direction
- SE
- Distance (km)
- 43.3
- SQM
- 20.48
- Bortle
- 5
-
63 km NE
- Direction
- NE
- Distance (km)
- 62.9
- SQM
- 20.83
- Bortle
- 4
-
56 km SSW
- Direction
- SSW
- Distance (km)
- 55.9
- SQM
- 20.59
- Bortle
- 5
-
16 km SSW
- Direction
- SSW
- Distance (km)
- 16.2
- SQM
- 19.75
- Bortle
- 6