Grimsby Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

18.72

Bortle class

Class 8 (Class 8)

Darkness Quotient

30%

Dataset

April 2026

City sky

Grimsby: The Practical Verdict

Grimsby, located in North East Lincolnshire, is a small city with a suburban setting. Its night skies face significant hindrance, labelled as a poor city sky due to high light pollution. Observing conditions are dominated by an urban glow that obscures fainter celestial features.

Amid the bright urban skies, targets such as the Moon, planets, bright stars, and double stars can still be enjoyed visually. Solar system events remain observably distinct, though the iconic spectacle of the Milky Way is entirely erased. Narrowband imaging can have some success on the brightest nebulae, but broader deep-sky endeavours are heavily constrained.

For residents or visitors seeking darker skies, Kilnsea, located about 15 km east north-east, offers an appreciably improved view with reduced light interference. This transition enables more immersive observing opportunities, particularly for deep-sky objects without the urban distractions of Grimsby.

At a Glance

Overall

Poor city sky - This is a poor city sky. The Milky Way is not visible and most deep-sky observing is unrealistic from the location itself.

Milky Way

Not visible - The Milky Way is erased by the bright urban sky background.

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

Kilnsea sits about 15 km east north east and reaches Bortle 4, roughly 8.1x darker.

Moderate dark window

Grimsby's limiting factor is not only light pollution. Around midsummer, Grimsby loses true astronomical darkness entirely, so deep-sky observing and imaging are strongly seasonal. Plan serious sessions around the darker months.

Frequently Asked Questions

Can you see the Milky Way from Grimsby?

No. Grimsby is a Bortle Class 8 sky with SQM 18.72, 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 Grimsby?

Grimsby is Bortle Class 8 (SQM 18.72), a poor city sky for astronomy.

Is Grimsby good for stargazing?

Not for serious deep-sky observing. Grimsby is a poor city sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.

Is Grimsby good for astrophotography?

Broadband deep-sky imaging is heavily compromised from Grimsby and a Bortle 4 or darker site is strongly recommended. Even narrowband imaging is difficult from Grimsby without careful processing.

What can you observe from Grimsby?

Primary targets from Grimsby 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 Grimsby?

The closest meaningfully darker mapped site is Kilnsea, about 15 km east north east of Grimsby, reaching Bortle 4.

When is the sky darkest in Grimsby?

The sky over Grimsby is darkest around January, December. Significant summer limitation: around 78 nights per year have no true astronomical darkness.

Is light pollution in Grimsby getting better or worse?

Long-term light pollution over Grimsby has been broadly stable across the available measurements.

• Kilnsea

  Direction

  ENE

  Distance (km)

  15

  SQM

  20.99

  Bortle

  4

• Great Carlton

  Direction

  SE

  Distance (km)

  27.3

  SQM

  20.67

  Bortle

  5

• South Leverton

  Direction

  WSW

  Distance (km)

  55.4

  SQM

  20.54

  Bortle

  5

• Cottam

  Direction

  NW

  Distance (km)

  62.2

  SQM

  20.74

  Bortle

  5

• Abbey Parks

  Direction

  S

  Distance (km)

  66.9

  SQM

  20.73

  Bortle

  5

• Ashill

  Direction

  SSE

  Distance (km)

  123.4

  SQM

  21.04

  Bortle

  4