Ramadhan brings massive crowds peaking during the last ten nights with over two million at tarawih. Mid-Ramadhan is relatively calmer.
Ramadhan is the second busiest period after Haji, attracting millions combining Umrah with the holy month's blessings. The first week sees major influx. Weeks two and three dip moderately. The last ten nights see extreme crowds, especially odd nights seeking Laylat al-Qadr.
Tarawih shalat are a major draw, with the Haram filling to capacity regularly exceeding two million during the last ten nights. The 27th night typically sees absolute peak attendance. Tawaf between Isha and tarawih can involve 2 to 4 hour waits.
Strategies: perform tawaf during less busy windows (after Fajr or late after tarawih). Arrive at the Haram 2 hours before shalat. Use upper floors. The first half of Ramadhan offers good balance of atmosphere and manageable crowds.