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)
19.00
Bortle class
Class 7 (Class 7)
Darkness Quotient
33%
Dataset
August 2026

Suburban/urban transition

Southend-on-Sea: The Practical Verdict

Southend-on-Sea, a small city in Essex, experiences high light pollution, affecting its stargazing quality. The overall assessment for astronomy here is poor, classified as a suburban/urban transition sky. The primary limiting factor is the substantial light pollution.

The Milky Way remains elusive from Southend-on-Sea, making it impractical for deep-sky visual observations. Targets such as the Moon, planets, and a select few bright double stars or open clusters offer some interest. Narrowband imaging remains possible with care, but anything more ambitious struggles against the sky's brightness.

For stargazers seeking substantial improvement, Campsea Ashe, about 85 km north-east, offers significantly darker skies. Visiting this location is advisable for those looking to seriously engage with deep-sky observing, as it presents Bortle 4 conditions, a meaningful upgrade over the city’s current limitations.

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
Campsea Ashe sits about 83 km north east and reaches Bortle 4, roughly 5.7x 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 19.00, 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 19.00), 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 Southminster, about 16 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 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 - 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 - 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.

  • Southminster
    Direction
    NE
    Distance (km)
    15.8
    SQM
    20.68
    Bortle
    5
  • Chartham
    Direction
    SE
    Distance (km)
    40.2
    SQM
    20.53
    Bortle
    5
  • Goddard's Green
    Direction
    S
    Distance (km)
    51.2
    SQM
    20.25
    Bortle
    6
  • Campsea Ashe
    Direction
    NE
    Distance (km)
    82.5
    SQM
    20.89
    Bortle
    4
  • Croxton
    Direction
    SSE
    Distance (km)
    104.2
    SQM
    20.75
    Bortle
    5
  • Kelshall
    Direction
    NW
    Distance (km)
    74.9
    SQM
    20.19
    Bortle
    6