Gurnee, IL
Six Flags Great America Crowd Calendar — April 2027
April 2027 at Six Flags Great America is a middle-of-the-pack month: the softest days all land in the second half of the month, and the heaviest days are scattered through the month. The softest day of the month is Monday, April 26 (Not Crowded), with Apr 27 and Apr 28 close behind. The day to avoid is Sunday, April 25, forecast Crowded.
Model-based forecasts from day-of-week patterns, US holidays, and school-break windows — not official attendance. For live conditions see wait times.
Is SF Great America crowded today? Full interactive calendar Park hub
April 2027
Not Crowded Crowded Closed
Best days in April 2027
- 1stNot CrowdedApr 26Monday
- 2ndNot CrowdedApr 27Tuesday
- 3rdNot CrowdedApr 28Wednesday
- 29 Apr 29 · Not Crowded
- 25 Apr 25 · Crowded
Days to avoid
- 25 Apr 25 · Crowded — Sundays are usually the busiest days of the week
- 30 Apr 30 · Crowded — Fridays are usually busier than average
- 26 Apr 26 · Not Crowded — Mondays are usually the quietest days of the week; Quieter off-season weekday
Planning April at Six Flags Great America
Use the softest days above if your dates are flexible — mid-week days outside holiday windows are usually the easiest visits of the month. If you can only come on a weekend, the best-weekend pick above is the lightest of a busy bunch. Check the today page on the morning of your visit and the full crowd calendar for the months either side of April.