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Six Flags Discovery Kingdom crowd predictor

September 2026Vallejo, California, United States

Six Flags Discovery Kingdom is typically moderately busy in September, averaging 47% crowd level. The quietest day is Wed 2 Sep at 13%, and the busiest is Sat 5 Sep at 72%.

Best day left in September

Wednesday 30 Sept

September 2026 is typically moderately busy at Six Flags Discovery Kingdom, averaging 47% crowd level. The busiest is Saturday 5 Sept at 72%.

19%crowds
Next bestTue 29 Sept 32%Mon 28 Sept 36%Sun 13 Sept 58%

Six Flags Discovery Kingdom is quiet today, at around 33% crowd levels, and quiet tomorrow. This weekend is looking busy.

This crowd predictor forecasts daily crowd levels for Six Flags Discovery Kingdom through 2026.What the % means

The number is how full the park is: how long the queues run on its main rides in the middle of the day, on one scale for every park (50% is about a 17-minute queue, 70% half an hour, 90% an hour), or, where the park sells dated tickets, the share of its capacity sold if that is higher. The word beside it (Quietest to Busiest) compares the day with this park's own history, so a small park can be at its busiest on a day that is still short queues. The lower the number, the shorter the queues, so pick a quiet day and ride more.

Daily crowd levels and opening hours for Six Flags Discovery Kingdom, September 2026
MonTueWedThuFriSatSun
121%Quieter213%Quietest318%Quieter419%Quieter572%Busier32 min lines11am - 8pm668%Busier29 min lines11am - 8pm
770%Busier30 min lines11am - 8pm8Closed9Closed10Closed11Closed1265%*BusierEst.27 min lines11am - 6pm1358%*TypicalEst.22 min lines11am - 6pm
14Closed15Closed16Closed17Closed18Closed1968%*BusierEst.29 min lines11am - 8pm2060%*TypicalEst.23 min lines11am - 7pm
21Closed22Closed23Closed24Closed25Closed2671%*BusierEst.31 min lines11am - 8pm2761%*TypicalEst.24 min lines11am - 7pm
2836%*TypicalEst.2932%*QuieterEst.3019%*QuieterEst.
  1. Tue1Hours unavailableSummer21%Quieter
  2. Wed2Hours unavailableSummer13%Quietest
  3. Thu3Hours unavailableSummer18%Quieter
  4. Fri4Hours unavailableSummer19%Quieter
  5. Sat511am - 8pmSummer72%Busier32 min lines
  6. Sun611am - 8pmSummer68%Busier29 min lines
  7. Mon711am - 8pmSummer70%Busier30 min lines
  8. Tue8Hours unavailableSummerClosed
  9. Wed9Hours unavailableSummerClosed
  10. Thu10Hours unavailableSummerClosed
  11. Fri11Hours unavailableSummerClosed
  12. Sat1211am - 6pmSummer65%*Est.Busier27 min lines
  13. Sun1311am - 6pmSummer58%*Est.Typical22 min lines
  14. Mon14Hours unavailableClosed
  15. Tue15Hours unavailableClosed
  16. Wed16Hours unavailableClosed
  17. Thu17Hours unavailableClosed
  18. Fri18Hours unavailableClosed
  19. Sat1911am - 8pm68%*Est.Busier29 min lines
  20. Sun2011am - 7pm60%*Est.Typical23 min lines
  21. Mon21Hours unavailableClosed
  22. Tue22Hours unavailableClosed
  23. Wed23Hours unavailableClosed
  24. Thu24Hours unavailableClosed
  25. Fri25Hours unavailableClosed
  26. Sat2611am - 8pm71%*Est.Busier31 min lines
  27. Sun2711am - 7pm61%*Est.Typical24 min lines
  28. Mon28Hours unavailable36%*Est.Typical
  29. Tue29Hours unavailable32%*Est.Quieter
  30. Wed30Hours unavailable19%*Est.Quieter
Quietest Among the quietest days at this parkQuieter Quieter than a normal day hereTypical A normal day for this parkBusier Busier than a normal day hereBusiest Among the busiest days at this park

Lines at Six Flags Discovery Kingdom average 19 minutes across 38 recorded days, and 42 minutes on the busiest of them. A high score means busy for this park.

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.

Seasonal events at Six Flags Discovery Kingdom

  • Oktoberfest runs 12 Sep to 1 Nov 2026, on selected dates.
  • Tricks and Treats (daytime family Halloween) runs 19 Sep to 1 Nov 2026, on weekends.
  • WinterFest (formerly Holiday in the Park) runs 27 Nov 2026 to 3 Jan 2027, on 18 selected nights. Evening event.

Event nights are among the busiest of the season. See the crowd calendar before you book.

Dates as published by the park. Always check the park's own site before travelling.

September 2026October 2026November 2026December 2026January 2027March 2027April 2027May 2027

Frequently asked

How busy is Six Flags Discovery Kingdom today?

Six Flags Discovery Kingdom is predicted to be quiet today, at around 33% crowd levels. Lower percentages mean shorter queues.

How busy will Six Flags Discovery Kingdom be tomorrow?

Six Flags Discovery Kingdom is predicted to be quiet tomorrow, at around 36% crowd levels.

Is Six Flags Discovery Kingdom busy this weekend?

This weekend Six Flags Discovery Kingdom is looking busy, at around 62% crowd levels on average.

When is the quietest day to visit Six Flags Discovery Kingdom in September 2026?

Wednesday 2nd is predicted to be the quietest day to visit Six Flags Discovery Kingdom in September 2026, at around 13% crowd levels.

When is Six Flags Discovery Kingdom busiest in September 2026?

Saturday 5th is predicted to be the busiest day at Six Flags Discovery Kingdom in September 2026, at around 72% crowd levels.

How busy is Six Flags Discovery Kingdom in September 2026?

On average, Six Flags Discovery Kingdom is quiet in September 2026 - around 40% crowd levels. Weekdays are usually quieter than weekends.

Is Six Flags Discovery Kingdom busier on weekends?

Yes - Six Flags Discovery Kingdom 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 Discovery Kingdom?

The best time to visit Six Flags Discovery Kingdom is on its quietest predicted days - Wednesday 2nd is the quietest in September 2026 (about 13%). Arriving at opening also means the shortest waits.

Is there a crowd predictor for Six Flags Discovery Kingdom?

Yes. This page is a free Six Flags Discovery Kingdom crowd predictor: it forecasts how busy every day will be through 2026, on a scale where 50% is about a 17-minute queue on the main rides and 90% is about an hour. The lower the number, the shorter the queues.

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