Crawley Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

19.03

Bortle class

Class 7 (Class 7)

Darkness Quotient

33%

Dataset

May 2026

Suburban/urban transition

Crawley: The Practical Verdict

Crawley is a small city in West Sussex with a suburban setting and a notable suburban/urban transition in its sky quality. As such, it features high light pollution that significantly limits stargazing opportunities, rendering the southern skies poor for astronomical observation. The primary challenge is combating urban sky brightness when observing faint celestial objects.

From Crawley, the Milky Way is essentially invisible due to the pervasive light pollution. The most promising targets are the Moon, planets, and bright double stars, with narrowband imaging offering some potential if well processed. Visual attempts at deep-sky observing or photography are largely futile here unless specialised techniques are employed.

A modest improvement in sky conditions can be found by venturing to Ashington, about 25 km south-south-west, where a Bortle Class 5 sky offers somewhat darker vistas. However, this doesn't represent a dramatic reduction in light pollution.

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 19.03, 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 Crawley?

Crawley is Bortle Class 7 (SQM 19.03), 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 Ashington, about 23 km south south 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.

• Ashington

  Direction

  SSW

  Distance (km)

  22.5

  SQM

  20.57

  Bortle

  5

• Hamsey

  Direction

  SSE

  Distance (km)

  23.8

  SQM

  20.55

  Bortle

  5

• Flexford

  Direction

  WNW

  Distance (km)

  35.7

  SQM

  20.34

  Bortle

  5

• Cranbrook & Sissinghurst

  Direction

  E

  Distance (km)

  49.9

  SQM

  20.67

  Bortle

  5

• Hooley

  Direction

  ESE

  Distance (km)

  16.8

  SQM

  19.75

  Bortle

  6