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)
- 19.03
- Bortle class
- Class 7 (Class 7)
- Darkness Quotient
- 33%
- Dataset
- July 2026
Suburban/urban transition
Southend-on-Sea: The Practical Verdict
Southend-on-Sea, a small city on the eastern coast of the United Kingdom, experiences significant light pollution interference, categorised as high. stargazing quality is poor to middling, making dedicated deep-sky observations a challenge. The primary limiting factor is the pervasive urban/suburban glow.
From Southend-on-Sea's location, the Milky Way is invisible due to the level of light pollution. Best observed celestial objects include the Moon, planets, and bright double stars, while deep-sky pursuits like visual observing of galaxies and nebulae are best avoided. For imagery, narrowband techniques focused on bright targets may still yield results.
For a real upgrade in sky quality, a trip around 105 km south south east offers a darker site with Bortle 4 conditions. This site presents a meaningful improvement, especially beneficial for those keen on serious deep-sky observing.
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
- 106 km SSE sits about 106 km south south 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 19.03, 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 19.03), 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 ENE, about 10 km east 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 60 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 - marginal
Noticeable glow on the west-north-west horizon. Stars below about 20 degrees in this direction are dimmed.
north-west - fair
The north-west sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
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 ENE
- Direction
- ENE
- Distance (km)
- 10.2
- SQM
- 20.56
- Bortle
- 5
-
11 km SW
- Direction
- SW
- Distance (km)
- 10.7
- SQM
- 20.15
- Bortle
- 6
-
42 km SSE
- Direction
- SSE
- Distance (km)
- 41.9
- SQM
- 20.41
- Bortle
- 5
-
62 km NE
- Direction
- NE
- Distance (km)
- 61.8
- SQM
- 20.80
- Bortle
- 5
-
57 km SSW
- Direction
- SSW
- Distance (km)
- 57.4
- SQM
- 20.52
- Bortle
- 5
-
106 km SSE
- Direction
- SSE
- Distance (km)
- 106.4
- SQM
- 20.80
- Bortle
- 4