Jacksonville Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

17.56

Bortle class

Class 9 (Class 9)

Darkness Quotient

19%

Dataset

May 2026

Inner city sky

Jacksonville: The Practical Verdict

Jacksonville, a major Atlantic port city in Florida, bears the typical hallmarks of a heavily light-polluted urban environment. The severe urban sky here makes it challenging for deep-sky astronomy, with the Milky Way entirely absent. Extreme light pollution severely restricts visibility.

From this sky, observations must focus primarily on bright objects like the Moon, planets, and double stars, which remain visible despite the city's light dome. While the brightest nebulae might reveal themselves under narrowband imaging, most deep-sky targets remain out of reach, and broadband imaging will struggle under the bright sky background.

There are limited upgrades possible, with sites such as Putnam County, Florida, about 75 km to the south, offering somewhat better conditions with Bortle 5 skies, but expectations for dramatic improvement should be tempered. The immediate surroundings do not offer significantly darker alternatives.

At a Glance

Overall

Severe urban sky - This is a severely light-polluted urban sky. Only the Moon, planets, bright stars, and a few specialist targets remain practical.

Milky Way

Not visible - The Milky Way is not visible from this sky.

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

Limited nearby upgrade

Putnam County, Florida is the strongest nearby option but remains Bortle 5; the improvement is real but modest.

Good dark window

Jacksonville'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 Jacksonville?

No. Jacksonville is a Bortle Class 9 sky with SQM 17.56, 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 Jacksonville?

Jacksonville is Bortle Class 9 (SQM 17.56), a severe urban sky for astronomy.

Is Jacksonville good for stargazing?

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

Is Jacksonville good for astrophotography?

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

What can you observe from Jacksonville?

Primary targets from Jacksonville 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 Jacksonville?

The closest meaningfully darker mapped site is Jacksonville, Florida, about 20 km north north east of Jacksonville, reaching Bortle 7.

When is the sky darkest in Jacksonville?

The sky over Jacksonville is darkest around January, December.

Is light pollution in Jacksonville getting better or worse?

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

• Jacksonville, Florida

  Direction

  NNE

  Distance (km)

  19.7

  SQM

  19.35

  Bortle

  7

• Saint Augustine, Florida

  Direction

  SE

  Distance (km)

  32.6

  SQM

  19.14

  Bortle

  7

• Putnam County, Florida

  Direction

  S

  Distance (km)

  76.7

  SQM

  20.62

  Bortle

  5

• Bridge Pointe at Jekyll Sound, Georgia

  Direction

  N

  Distance (km)

  80.6

  SQM

  20.31

  Bortle

  5

• Northwest 67th Place, Florida

  Direction

  WSW

  Distance (km)

  125.5

  SQM

  20.53

  Bortle

  5

• Northwest 104th Terrace, Florida

  Direction

  SSW

  Distance (km)

  121.3

  SQM

  20.32

  Bortle

  5