Guildford Stargazing & Astronomy Report
Light pollution and stargazing locations near Guildford
- City
- Guildford
- Country
- United Kingdom
- Latitude
- 51.2362
- Longitude
- -0.5704
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 19.62
- Bortle class
- Class 6 (Class 6)
- Darkness Quotient
- 42%
- Dataset
- April 2026
Bright suburban sky
Guildford: The Practical Verdict
Guildford is a limited suburban sky for astronomy. The sky background is generally too bright for a reliable Milky Way view.
Realistic targets include Moon, planets, double stars, bright open clusters, narrowband imaging. With care, globular clusters and bright emission nebulae with filters are also accessible.
For darker conditions: Bepton, about 35 km south south west, is the strongest nearby option (Bortle 5).
At a Glance
- Overall
- Limited suburban sky - This is a limited sky for astronomy. The brightest targets remain accessible, but faint deep-sky observing is heavily compromised.
- Milky Way
- Not visible - The sky background is generally too bright for a reliable Milky Way view.
- Best targets from here
- Moon, planets, double stars, bright open clusters, narrowband imaging, bright nebula cores
- Do not prioritise
- broadband galaxies, reflection nebulae, visual faint nebulae, Milky Way photography
- Limited nearby upgrade
- Bepton is the strongest nearby option but remains Bortle 5; the improvement is real but modest.
- Moderate dark window
- Guildford'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 Guildford?
No. Guildford is a Bortle Class 6 sky with SQM 19.62, 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 Guildford?
Guildford is Bortle Class 6 (SQM 19.62), a limited suburban sky for astronomy.
Is Guildford good for stargazing?
Not for serious deep-sky observing. Guildford is a limited suburban sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.
Is Guildford good for astrophotography?
Broadband deep-sky imaging is heavily compromised from Guildford and a Bortle 4 or darker site is strongly recommended. Narrowband imaging of bright emission nebulae remains viable from Guildford with appropriate Ha or OIII filters.
What can you observe from Guildford?
Primary targets from Guildford include Moon, planets, double stars, bright open clusters, narrowband imaging. Targets such as broadband galaxies, reflection nebulae, visual faint nebulae are not realistic from this sky.
Where are darker skies near Guildford?
The closest meaningfully darker mapped site is Bepton, about 35 km south south west of Guildford, reaching Bortle 5.
When is the sky darkest in Guildford?
The sky over Guildford is darkest around January, December. Significant summer limitation: around 57 nights per year have no true astronomical darkness.
Is light pollution in Guildford getting better or worse?
Long-term light pollution over Guildford has been broadly stable across the available measurements.
north - fair
The north sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
north-north-east - fair
A trace of skyglow near the north-north-east horizon. Stars are clear throughout this direction except very close to the ground.
north-east - fair
Faint glow on the north-east horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
east-north-east - good
Dark horizon to the east-north-east. Faint stars and extended objects in this direction behave much as they do overhead.
east - good
Dark horizon to the east. Faint stars and extended objects in this direction behave much as they do overhead.
east-south-east - good
Dark sky in the east-south-east direction with no obvious skyglow. Suitable for faint-object work at low elevation.
south-east - good
No noticeable light pollution to the south-east. The sky in this direction is dark to the horizon.
south-south-east - good
No noticeable light pollution to the south-south-east. The sky in this direction is dark to the horizon.
south - good
No noticeable light pollution to the south. The sky in this direction is dark to the horizon.
south-south-west - good
Dark horizon to the south-south-west. Faint stars and extended objects in this direction behave much as they do overhead.
south-west - good
Dark horizon to the south-west. Faint stars and extended objects in this direction behave much as they do overhead.
west-south-west - good
No noticeable light pollution to the west-south-west. The sky in this direction is dark to the horizon.
west - good
The west horizon is dark. Faint stars are visible close to the ground.
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
A trace of skyglow near the north-west horizon. Stars are clear throughout this direction except very close to the ground.
north-north-west - good
Dark sky in the north-north-west direction with no obvious skyglow. Suitable for faint-object work at low elevation.
zenith - fair
Limiting magnitude at the zenith is around 4.5. Constellation outlines are clear; the faintest stars between them are absent.
-
Bepton
- Direction
- SSW
- Distance (km)
- 34.9
- SQM
- 20.69
- Bortle
- 5
-
Gilbert Street
- Direction
- WSW
- Distance (km)
- 36.9
- SQM
- 20.61
- Bortle
- 5
-
Lower Kingswood
- Direction
- E
- Distance (km)
- 23.6
- SQM
- 20.13
- Bortle
- 6
-
Hungerford Newtown
- Direction
- WNW
- Distance (km)
- 67.7
- SQM
- 20.68
- Bortle
- 5
-
Lamberhurst
- Direction
- E
- Distance (km)
- 67.9
- SQM
- 20.61
- Bortle
- 5