Yes, tawaf is available 24/7 at Masjidil Haram. Midnight hours offer the least crowds, coolest temperatures, and most intimate spiritual experience.
Yes, Masjidil Haram is open 24 hours. Late night tawaf, after Isha until Fajr, is widely considered the best time outside of Haji season. Crowds thin significantly, temperatures drop, and the atmosphere of circling the Kabah under the night sky is profoundly moving.
During non-peak seasons, midnight tawaf can be remarkably uncrowded, allowing you to get close to the Kabah and even touch the Hajar Aswad. During Ramadhan and Haji, even midnight can be crowded, though less so than daytime.
Practical tips: nap after Isha and set an alarm for midnight. Eat a light meal before heading out. Shops near the Haram often stay open late. The tawaf area briefly clears during Tahajjud shalat congregation. Bring a light jacket.