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Six Flags Great America crowd calendar, September 2026

September 202630 days forecast

Six Flags Great America is typically moderately busy in September 2026, averaging 48% crowd level. The quietest day is Fri 4 Sep at 5%, and the busiest is Mon 7 Sep at 72%.

Best day left in September

Tuesday 15 Sept

September 2026 is typically moderately busy at Six Flags Great America, averaging 48% crowd level. The busiest is Monday 7 Sept at 72%.

53%crowds
Next bestThu 17 Sept 53%Fri 11 Sept 54%Wed 16 Sept 54%

Six Flags Great America is moderately busy today, at around 54% crowd levels, and moderately busy tomorrow. This weekend is looking moderately busy. Six Flags Great America is typically moderately busy in September 2026, averaging around 48% crowd levels. The quietest day to visit is predicted to be Friday 4th (about 5%), while the busiest is Monday 7th (about 72%). Weekdays are noticeably quieter than weekends, so a midweek visit means shorter queues.

Wondering how busy Six Flags Great America will be in September 2026? This calendar predicts crowd levels day by day. The lower the score, the shorter the queues, so pick a quiet day and ride more.

Daily crowd levels and opening hours for Six Flags Great America, September 2026
MonTueWedThuFriSatSun
129%Quieter221%Quieter325%Quieter45%Quietest553%Quieter19 min queues671%Busier31 min queues
772%Busier33 min queues815%Quietest98%Quietest108%Quietest1154%*QuieterEst.20 min queues1260%*TypicalEst.23 min queues1358%*TypicalEst.22 min queues
1455%*TypicalEst.20 min queues1553%*QuieterEst.19 min queues1654%*QuieterEst.19 min queues1753%*QuieterEst.19 min queues1857%*TypicalEst.21 min queues1961%*TypicalEst.24 min queues2060%*TypicalEst.23 min queues
2156%*TypicalEst.20 min queues2258%*TypicalEst.22 min queues2357%*TypicalEst.21 min queues2456%*TypicalEst.20 min queues2558%*TypicalEst.22 min queues2661%*TypicalEst.24 min queues2764%*TypicalEst.26 min queues
2857%*TypicalEst.21 min queues2956%*TypicalEst.20 min queues3054%*QuieterEst.20 min queues
  1. Tue1Hours unavailableSummer29%Quieter
  2. Wed2Hours unavailableSummer21%Quieter
  3. Thu3Hours unavailableSummer25%Quieter
  4. Fri4Hours unavailableSummer5%Quietest
  5. Sat5Hours unavailableSummer53%Quieter19 min queues
  6. Sun6Hours unavailableSummer71%Busier31 min queues
  7. Mon7Hours unavailableSummer72%Busier33 min queues
  8. Tue8Hours unavailableSummer15%Quietest
  9. Wed9Hours unavailableSummer8%Quietest
  10. Thu10Hours unavailableSummer8%Quietest
  11. Fri11Hours unavailableSummer54%*Est.Quieter20 min queues
  12. Sat12Hours unavailableSummer60%*Est.Typical23 min queues
  13. Sun13Hours unavailableSummer58%*Est.Typical22 min queues
  14. Mon14Hours unavailable55%*Est.Typical20 min queues
  15. Tue15Hours unavailable53%*Est.Quieter19 min queues
  16. Wed16Hours unavailable54%*Est.Quieter19 min queues
  17. Thu17Hours unavailable53%*Est.Quieter19 min queues
  18. Fri18Hours unavailable57%*Est.Typical21 min queues
  19. Sat19Hours unavailable61%*Est.Typical24 min queues
  20. Sun20Hours unavailable60%*Est.Typical23 min queues
  21. Mon21Hours unavailable56%*Est.Typical20 min queues
  22. Tue22Hours unavailable58%*Est.Typical22 min queues
  23. Wed23Hours unavailable57%*Est.Typical21 min queues
  24. Thu24Hours unavailable56%*Est.Typical20 min queues
  25. Fri25Hours unavailable58%*Est.Typical22 min queues
  26. Sat26Hours unavailable61%*Est.Typical24 min queues
  27. Sun27Hours unavailable64%*Est.Typical26 min queues
  28. Mon28Hours unavailable57%*Est.Typical21 min queues
  29. Tue29Hours unavailable56%*Est.Typical20 min queues
  30. Wed30Hours unavailable54%*Est.Quieter20 min queues
Quietest 0-15%Quieter 15-35%Typical 35-65%Busier 65-88%Busiest 88-100%

Crowd levels are modelled from this park's own recorded queue times, school and public holidays, day of the week and the weather forecast, and may not always be right. Opening hours come from the park and can change. Always check the park's own site before travelling. We score every past forecast against what the queues actually did and publish the result in the crowd forecast accuracy ledger.

October 2026November 2026December 2026January 2027February 2027March 2027April 2027May 2027Full crowd calendar

Frequently asked

How busy is Six Flags Great America today?

Six Flags Great America is predicted to be moderately busy today, at around 54% crowd levels. Lower percentages mean shorter queues.

How busy will Six Flags Great America be tomorrow?

Six Flags Great America is predicted to be moderately busy tomorrow, at around 60% crowd levels.

Is Six Flags Great America busy this weekend?

This weekend Six Flags Great America is looking moderately busy, at around 59% crowd levels on average.

When is the quietest day to visit Six Flags Great America in September 2026?

Friday 4th is predicted to be the quietest day to visit Six Flags Great America in September 2026, at around 5% crowd levels.

When is Six Flags Great America busiest in September 2026?

Monday 7th is predicted to be the busiest day at Six Flags Great America in September 2026, at around 72% crowd levels.

How busy is Six Flags Great America in September 2026?

On average, Six Flags Great America is moderately busy in September 2026 - around 48% crowd levels. Weekdays are usually quieter than weekends.

Is Six Flags Great America busier on weekends?

Yes - Six Flags Great America is typically busier at weekends than midweek in September 2026. Visit on a weekday for shorter queues.

What is the best time to visit Six Flags Great America?

The best time to visit Six Flags Great America is on its quietest predicted days - Friday 4th is the quietest in September 2026 (about 5%). Arriving at opening also means the shortest waits.