What goes into a crowd score?

Day of week, US federal holidays, typical school-break windows, and park-specific seasonal factors — a rules model, not live sensors.

Is this official park attendance data?

No. We do not use official operator attendance disclosures, scraped competitor calendars, or invented accuracy percentages.

Do live wait times feed the forecast model?

No. Live waits from Queue-Times.com are shown separately on park pages; forecasts come from the rules model until calibrated with our own wait snapshots.

How Crowd Predictions Work Methodology

Last updated: 2026-09-25

IsItCrowded answers a planning question: is it crowded? We publish transparent, model-based crowd forecasts based on seasonal patterns, holidays, and park-specific factors — not live crowd sensors, not official park attendance feeds, and not copied ratings from other websites.

We are not claiming Disney (or any operator) attendance. Not Crowded · A Little Crowded · Crowded · Super Crowded tiers are our relative planning labels only.

How IsItCrowded forecasts work: seasonal patterns, holidays and park-specific factors scored Not Crowded to Super Crowded — How it works: seasonal patterns, holidays, and park-specific factors become Not Crowded → Super Crowded planning labels.

What the score is

Each date gets a score from 1–4 mapped to:

Not Crowded — the lowest relative crowd pressure our model expects; it does not mean every attraction will be a walk-on
A Little Crowded — a normal day for that season; popular rides still build waits mid-day
Crowded — long lines at headliners; plan around them
Super Crowded — as crowded as it gets; rope-drop and have a plan

Day of week = rules model (until calibrated)

By default, the day-of-week baseline is a rules model: Monday–Thursday start quieter; Friday higher; Saturday usually highest; Sunday still high. That is an assumption for planning — not a claim that we trained on years of observed waits or official gated attendance.

For a small set of parks (Disneyland, Disney California Adventure, Knott’s, Universal Studios Hollywood) we may reshape that generic weekday curve with calibrated relative weekday multipliers derived from our own daily wait aggregates (ThemeParks.wiki history / live snapshots), when enough samples exist. The pipeline has two stages: (1) a generic weekday base score from day-of-week rules (e.g. Saturday’s base is higher than Tuesday’s), and (2) a relative multiplier per weekday. Raw day-of-week medians ÷ overall median are compressed toward 1.0 to form the multiplier — clamped to 0.92–1.08 for Fri–Sun and 0.85–1.12 for Mon–Thu — so calibration reshapes Mon–Thu without multiplying an already-high weekend base into Super Crowded every Saturday. The final score is base × multiplier. Otherwise we fall back to the rules model. See forecast accuracy for predicted vs observed when data exists.

Other inputs

US federal holidays (and nearby days) for 2025–2027, including Thanksgiving week and the Christmas–New Year corridor.
Super Crowded seasons — mid-June to mid-August; late November through early January; spring break / Easter windows and a mid-March–early April CA-style break band.
Park profiles — e.g. stronger Halloween boosts where Haunt seasons matter; Disney festive-season multipliers; Vegas weekend destination weight; milder zoo weekdays.
Dampeners — early January after New Year week; early December weekdays before the holiday ramp; and a SoCal shoulder damp for Disneyland, California Adventure, Knott’s, and Universal Hollywood from roughly mid-August through early October (including Fri–Sun, milder on Saturday than Mon–Thu) so Crowded/Super Crowded weekends are not forced when observed waits are Not Crowded.
Disney weekend floor — Fri–Sun Not Crowded is lifted only to a light A Little Crowded threshold (~1.4 raw); we do not force Crowded.

Live waits vs forecasts

Live posted ride lines on wait-times pages are Powered by Queue-Times.com (display only — we do not bulk-archive Queue-Times into a historical warehouse). Stored history / derived stats for calibration use ThemeParks.wiki where attributed.

What we do not use

Official Disney / Universal / Six Flags attendance disclosures
Scraped or reproduced competitor calendars, wording, or rating scales
Invented “accuracy %” or hands-on product test claims

Limitations

Special events, temporary closures, new attractions, weather, and one-off conventions can move real-world crowds away from seasonal averages. Always confirm park hours and ticket rules with the operator. See our disclaimer.

Implementation lives in client-side JavaScript (/js/crowd-model.js) so calendars work on static hosting.