Know tonight.
Plan what comes next.
Free checks one place. Pro compares places and upcoming nights when you need a better plan.
Know what the check uses
Darkest Hour checks the available provider feeds — MET Norway weather and NOAA space weather — and shows the source, valid time and delivery state with the answer. Forecast inputs can be cached or unavailable; those states stay visible.
Free check
- — One-place Tonight decision
- — Cloud and moon context
- — Source and uncertainty labels
Pro
- — Compare up to three forecast candidates
- — Scan upcoming nights
- — Clear-window planning
- — Saved-place alerts waitlist
- — Cancel anytime
Pro
- — Same Pro planning tools
- — Annual billing
- — Saved-place alerts waitlist
- — Cancel anytime
Decide before you pay
Not sure tonight's the night? Check tonight free first, then come back if the Pro planner matters.
Need help before paying?
Ask before paying. Send your nearest town, target night and max drive radius and we will sanity-check whether Pro is likely to help before you start Stripe checkout.
Ask before payingFor the night you
actually want to plan.
How the verdict is built
The tonight check scores your exact coordinates from live provider feeds — cloud cover (30% weight), darkness (22%), moon phase and window (18%), transparency (18%), seeing (12%), minus a drive penalty — and labels every input's source and update time. A single number, with the uncertainty attached instead of hidden.
What Pro adds
Free covers one spot. Pro compares your top three nearby sites against the same live forecasts, scans the week for the best night, finds clear windows, and exports a session brief — so the answer is "this site, that night", not just "tonight, maybe".
Editorial note
Written and reviewed by Sam, founding editor of Darkest Hour. Pricing is shown in USD and processed by Stripe — we never see your card details. Live inputs: MET Norway (weather, CC-BY 4.0), NOAA SWPC (space weather), current orbital elements (satellites); darkness values are modelled estimates, not satellite-measured data. Editorial standards. Last reviewed 17 Aug 2026.
Paid PDF guides are companion resources. Pro is for comparing forecast candidates and planning upcoming nights.
Stripe handles card details — we never see them. Cancel anytime from your dashboard.
Pro subscriptions are refundable within 14 days — see the refund policy.