Crawley Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

19.09

Bortle class

Class 7 (Class 7)

Darkness Quotient

34%

Dataset

July 2026

Suburban/urban transition

Crawley: The Practical Verdict

Crawley, located in West Sussex, is a small city with a suburban setting. The overall sky quality here is poor for astronomy, categorised as a Class 7 sky, meaning high light pollution. The significant glow from London, about 45 km to the north, heavily impacts the local sky brightness, particularly in that direction.

Observing conditions in Crawley are quite limited, with the Milky Way not visible at all. Under these conditions, your best bets are the Moon, planets, bright double stars and open clusters, or narrowband imaging with careful processing. Visual deep-sky observing and broader astrophotography are largely ineffective due to the dominant light pollution.

While there are some nearby areas like Ashington, about 25 km to the south-west, offering slightly darker skies, the improvement is only modest. Expect marginal gains; practical observation from Crawley itself is primarily limited to brighter targets.

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

Limited nearby upgrade

Ashington is the strongest nearby option but remains Bortle 5; the improvement is real but modest.

Moderate dark window

Crawley'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 Crawley?

No. Crawley is a Bortle Class 7 sky with SQM 19.09, 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 Crawley?

Crawley is Bortle Class 7 (SQM 19.09), a poor urban/suburban sky for astronomy.

Is Crawley good for stargazing?

Not for serious deep-sky observing. Crawley 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 Crawley good for astrophotography?

Broadband deep-sky imaging is heavily compromised from Crawley and a Bortle 4 or darker site is strongly recommended. Narrowband imaging of bright emission nebulae remains viable from Crawley with appropriate Ha or OIII filters.

What can you observe from Crawley?

Primary targets from Crawley 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 Crawley?

The closest meaningfully darker mapped site is Ewhurst, about 17 km west north west of Crawley, reaching Bortle 5.

When is the sky darkest in Crawley?

The sky over Crawley is darkest around January, December. Significant summer limitation: around 55 nights per year have no true astronomical darkness.

Is light pollution in Crawley getting better or worse?

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

• Ewhurst

  Direction

  WNW

  Distance (km)

  17.4

  SQM

  20.48

  Bortle

  5

• Ashington

  Direction

  SW

  Distance (km)

  23.3

  SQM

  20.60

  Bortle

  5

• East Chiltington

  Direction

  SSE

  Distance (km)

  22.4

  SQM

  20.54

  Bortle

  5

• Cranbrook & Sissinghurst

  Direction

  E

  Distance (km)

  49.9

  SQM

  20.66

  Bortle

  5

• Gatton

  Direction

  SE

  Distance (km)

  16.7

  SQM

  19.70

  Bortle

  6

• Sutton

  Direction

  NE

  Distance (km)

  81.9

  SQM

  20.16

  Bortle

  6