IDA-certified public observatory east of Cleveland.
Updated:
· Tonight: Friday, August 14, 2026
📍 NE OH🌑 Bortle 4🚗 Located at 10610 Clay Street in Montville Township, Geauga County, OH, east of Cleveland.
About Geauga Observatory Park
Geauga Park District's Observatory Park, east of Cleveland, grew out of the donation of a historic telescope and now anchors a certified Dark Sky Park with the relocated Nassau Observatory at its center. It's designed from the ground up to limit light pollution, and it's genuinely free to walk in and set up a scope any clear night.
What you can see in the sky
Milky Way, planets, and deep-sky objects — a notably dark sky for how close it sits to a major metro area.
Best time of year
Any clear night — the park is self-serve for astronomy outside of scheduled programs, which run through much of the year.
Why this site is worth the drive
Home to the historic Nassau Observatory, moved from Cleveland in 1957 to escape light pollution
Designed specifically to minimize light pollution within the park
Open for self-serve astronomy any clear night, with scheduled public programs too
Practical tips for Geauga Observatory Park
Park buildings are only open during scheduled programs, but the grounds are open for self-serve stargazing on clear nights
Check hours — extended to 1 AM Memorial Day to Labor Day, 11 PM the rest of the year
One of the more accessible dark-sky sites for the Cleveland metro area
Live 48-hour forecast
Tonight's verdict above is a build-time snapshot. For the full
hourly view — cloud cover, transparency, seeing, smoke, humidity,
moon altitude and a Bortle-aware tonight score by observing mode
(visual, deep-sky, planetary, astrophoto) — open the live forecast:
The live page combines Open-Meteo weather, US-AQI wildfire smoke,
moon math and Bortle-scale darkness into a single tonight score
(0–100), updated continuously.
Frequently asked questions
Is Geauga Observatory Park good for stargazing tonight?
Tonight's verdict is Good (High confidence). 4h clear window during astronomical night, mean cloud 36%.
When is the best time of year to stargaze at Geauga Observatory Park?
Any clear night — the park is self-serve for astronomy outside of scheduled programs, which run through much of the year.
How long is the drive from Toronto?
Located at 10610 Clay Street in Montville Township, Geauga County, OH, east of Cleveland.
What can I see in the sky here?
Milky Way, planets, and deep-sky objects — a notably dark sky for how close it sits to a major metro area.
How dark is the sky? (Bortle scale)
Geauga Observatory Park sits at Bortle class 4 on the 1–9 dark-sky scale, where 1 is a pristine wilderness sky and 9 is an inner-city sky.