June, July, August and December — the summer holiday and Christmas Candylane weekends.
Quietest months
May and September — May weekdays and September weekends once school returns.
Local knowledge: Hershey hotel guests get early entry, which is a cheaper line-skip than Fast Track if you were booking a room anyway.
How this is worked out
Each day starts from how that weekday normally runs at Hersheypark, learned from our own recorded wait snapshots as they accumulate, and is raised for public holidays and school-holiday periods. It is a forecast of relative busyness, not a promise: a 3 means a day that usually runs quiet for this park, not a guarantee of short lines. The further out a date sits, the more it leans on the weekday pattern alone.
Want the live picture instead? Hersheypark wait times has today's queues, the hour-by-hour curve and what counts as a normal wait here. Planning a specific day? Open the planner and it will build a route around these crowd levels.