Cloud risk
Patchy but workable
38% cloud cover input.
Tonight sky check
Check tonight's sky before you set up.
DarkestHour turns dark-sky maps, moon timing, clouds, seeing, transparency and satellite events into a simple field decision: go now, wait, or plan another night.
Dark-sky data is a mathematical model, not real-time satellite measurements. Bortle, SQM, and sky brightness values are derived from city-level radiance estimates — treat them as a plausibility check, not a guarantee.
Building tonight's forecast decision...
Moon
Unavailable
Moon illumination and altitude were not supplied for this planning window.
Light pollution
Unavailable
No measured or licensed light-radiance input is active for this decision.
Seeing / transparency
Unavailable
The inputs needed for a defensible estimate were not supplied by the active weather source.
Checking Pro access…
Founding Pro push
If tonight might cost you sleep, gear setup or fuel, check Pro before you commit.
Pro is for the night you are actually considering: top-three nearby candidate sites, distance-aware score, best-night scan and a session brief before you commit time, gear or fuel.
Secure StripeSame-email unlockPrice confirmed by secure Stripe checkout
Pro wedge
Paid Pro catches rare clear windows.
The free map and tonight check get users in. Pro answers the expensive question for serious photographers and sky watchers: which night, site and clear window is actually worth planning around?
Clear-Window Finder: top 3 nearby candidate spots
Best night this week
Location-aware moon/cloud/seeing session brief
Saved-place clear-sky alerts beta priority
Aurora, meteor, ISS and Starlink watch alerts