TONIGHT · Mon, Nov 9More reliable forecast
80/100Promising29% cloud in best window · New Moon (0% illuminated)
Astronomical dusk: 6:15 PM GMT
Best 3-hour window: 1 AM–4 AM GMT
UPDATED HOURLY
Is Tonight Good for Stargazing in London?
Tonight’s observing conditions and the next seven-night outlook for London, United Kingdom.
TONIGHT · Mon, Nov 9
London
80/100
Promising conditions for stargazing
Observing night: evening → morning · Europe/London
Window dates: Nov 10, 2026 01:00 → Nov 10, 2026 04:00
Tonight means the evening of the first date through the following morning, in the city’s time zone—not the night that just ended.
Updated · Time zone: Europe/London.
The server snapshot is cached for up to one hour.
The score includes forecast sky conditions and a Moon-phase proxy after astronomical dusk. Moonrise, local light pollution and site access are not scored; bright planets and faint deep-sky targets have different requirements.
Is tonight good for stargazing? Promising. The strongest three-hour window is 1 AM–4 AM GMT, with 29% forecast cloud and 0% illuminated.
Based on the strongest continuous three-hour combination of hourly cloud, visibility and humidity after astronomical dusk.
Tonight, hour by hour
One-hour forecast intervals within astronomical darkness. Highlighted rows are the exact three hours used for tonight’s score. Scores are rounded; their average is rounded again.
Compare the hours
Lines use the same values as the table. Gaps mean unknown data; cloud layers overlap and are not added. The shaded band marks the existing best three-hour window, where available. Europe/London
- Total cloud
- Low cloud
- Middle cloud
- High cloud
Selected hour: 2026-11-09 19:00
Total cloud: 34% · Low cloud: 34% · Middle cloud: 0% · High cloud: 0%
| Local date / time | Score | Cloud |
|---|---|---|
| Other dark hour | 81/100 | 34% |
| Other dark hour | 81/100 | 31% |
| Other dark hour | 43/100 | 88% |
| Other dark hour | 67/100 | 50% |
| Other dark hour | 80/100 | 29% |
| Other dark hour | 55/100 | 70% |
| Best window | 66/100 | 52% |
| Best window | 98/100 | 0% |
| Best window | 76/100 | 35% |
| Other dark hour | 33/100 | 91% |
Why this score?
Largest modeled deductions in the selected window—not a visibility guarantee.
- Clouds: 29% total and 0% high cloud on average.
THIS WEEK
What is the best night for stargazing in London this week?
Thu, Nov 12 has the most favorable whole-night trend in the next seven nights. Tonight’s best three-hour window scores 80/100. Recheck closer to that date before making plans.
Whole-night averages
Tonight’s whole-night average is 68/100. Nov 12, 2026 is recommended for its stronger whole-night trend, not a precise three-hour score. Recheck closer to that date.
NEXT 7 NIGHTS
Choose a better night to observe
Best upcoming night: Thu, Nov 12 · Promising trend
Tue, Nov 10More reliable forecast
36/100Challenging100% cloud in best window · New Moon (0% illuminated)
Astronomical dusk: 6:14 PM GMT
Best 3-hour window: 12 AM–3 AM GMT
Wed, Nov 11More reliable forecast
51/100Challenging92% cloud in best window · Waxing Crescent (3% illuminated)
Astronomical dusk: 6:13 PM GMT
Best 3-hour window: 11 PM–2 AM GMT
Thu, Nov 12Forecast may change
TrendPromising11% nightly average cloud · Waxing Crescent (7% illuminated)
Astronomical dusk: 6:11 PM GMT
Indicative only — check again closer to the date.
Fri, Nov 13Forecast may change
TrendPromising8% nightly average cloud · Waxing Crescent (14% illuminated)
Astronomical dusk: 6:10 PM GMT
Indicative only — check again closer to the date.
Sat, Nov 14Check again closer to the date
TrendFair74% nightly average cloud · Waxing Crescent (22% illuminated)
Astronomical dusk: 6:09 PM GMT
Indicative only — check again closer to the date.
Sun, Nov 15Check again closer to the date
TrendChallenging77% nightly average cloud · Waxing Crescent (31% illuminated)
Astronomical dusk: 6:08 PM GMT
Indicative only — check again closer to the date.
Best-night ranking compares each whole-night average. The first three cards display the best three-hour score; days 4–7 show only an indicative trend. Check again before travelling.
Only the city is saved in this browser after you choose Save; no score or location permission is stored. Use Remove to clear it.
0% illuminated · Check Moon phase and planning
Same three-hour window as the score
Local time
Current surface visibility
CURRENT SNAPSHOT, LAYER BY LAYER
Professional observing conditions
These are current forecast fields; the tonight score above uses the best three-hour window. Compare both with local conditions before travelling.
Near-surface layer
Middle atmosphere
Thin cloud can spread skyglow
PM2.5 28.2 μg/m³ · AOD 0.18
Optics dew indicator
7Timer ASTRO model
Local time
Higher values may reduce transparency
Aurora visibility tonight
Choose a location to load NOAA activity and local conditions.
What this forecast means in London
London’s skyglow and frequent layered cloud can reduce contrast even when surface visibility looks acceptable. Summer nights are also short at this latitude, so astronomical darkness and high cloud deserve as much attention as the headline cloud percentage.
HUMAN-REVIEWED OPTIONS
Where to try stargazing near London
These are planning candidates, not guarantees of darkness, safety or nighttime access. A site may close before the forecast’s best window; compare its posted hours with the recommended time.
North London
Hampstead Heath
Good for: Moon, planets and bright constellations
Elevated open areas offer broad sky views while remaining reachable by public transport.
Before you go: Use open, familiar areas and review current Heath rules. The constabulary’s published patrol hours do not mean every area is equally suitable late at night.
Information checked: 2026-10-31
Southwest London
Richmond Park
Good for: Meteor showers and wider-field observing
London’s largest Royal Park provides extensive open grassland and more separation from the city centre.
Before you go: Pedestrian gates normally open 24/7. During November–early December and February–early March deer culls, gates close 8pm–7:30am except Friday and Saturday nights. Vehicle gates close at dusk. Confirm current cull notices; do not assume overnight access.
Information checked: 2026-10-31
Southwest London · near Hampton Court
Bushy Park
Good for: Bright deep-sky targets and meteor watching
Large, flat open spaces can provide wider horizons than central London parks.
Before you go: Pedestrian gates normally open 24/7. During September–mid October and November–mid December deer culls, pedestrian access is 8am–10:30pm. Vehicle gates close at dusk. Check current notices and avoid disturbing wildlife.
Information checked: 2026-10-31
Review dates are shown per option. Confirm current access, weather, transport and local safety before leaving.
Find a darker place to observe
Search your destination on a light-pollution map, or browse certified Dark Sky Places. These are external planning resources, not additional live forecast data.
A dark map color does not guarantee clear skies, legal nighttime access or safety. Check the map layer and date, then confirm opening hours, permits, transport and local conditions with the site's operator. These links do not send your coordinates automatically.
Sources and accuracy note
This forecast combines public model data with local astronomical calculations. Missing upstream fields are shown honestly rather than estimated without support.