Opaque cloud is normally the first constraint.
CURRENT-WEATHER TOOL
Tonight Stargazing Checker
Check current sky conditions. For tonight’s best hours and seven-night planning, use the homepage forecast.
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.
CRAWLABLE TOOL EXPLANATION
What the checker returns
A live result shows the requested place, a planning score, current cloud cover and humidity, surface visibility, estimated transparency and seeing, Moon phase and illumination, and local astronomical dusk when available.
Prefer the Moon, planets and bright stars over faint galaxies.
This can occur at high latitudes during summer.
These are interpretation examples, not live conditions. The live result is requested from Open-Meteo after submission. See the calculation methodology.
How the score works
The score combines current cloud cover, humidity, surface visibility, estimated transparency, estimated seeing, calculated Moon illumination and local astronomical dusk. It intentionally avoids false precision: local lamps, smoke, terrain and sudden clouds can change the result.
Case 1: good weather at noon is not a clear night
Illustrative case — not live data
You check at local noon:5% cloud,20 km visibility and low humidity. Those inputs describe favorable weather, not visible stars in daylight. Wait for the listed astronomical dusk, then use the homepage planner to compare actual evening hours; today's noon snapshot cannot predict that they stay clear.
Case 2: a clear but moonlit night
Illustrative case — not live data
At night you read 5% cloud,20 km surface visibility and 95% lunar illumination. That can still suit Moon watching if the Moon is above your horizon, but faint Milky Way structure or a low-contrast galaxy may be washed out. Change the target, or check a verified Moon-free dark interval or another date; such an interval may not exist tonight. This snapshot does not calculate exact moonset.
Case 3: high visibility, but too much cloud
Illustrative case — not live data
The current result shows 80% cloud and 25 km visibility. Visibility measures how far you can see through near-surface air; it does not mean the sky overhead is cloud-free. Even a bright planet can be blocked. Check the hourly planner for a sustained gap before travelling, or postpone. Its future three-hour window can differ from this current snapshot without either result describing the same time.
What this tool does not include
- This is a current snapshot, not the seven-night planner or a three-hour-window score.
- It does not calculate Galactic Center or planet rise times, exact Moon rise/set, local obstructions or permission to enter a site.
- A weather-derived seeing/transparency indicator is not an observatory measurement or the separate 7Timer category.