Sleepwalking will most likely occur during which part of the night?

Sleep walking most often occurs during deep non-REM sleep.

Sleep walking is a sleep disorder characterized by walking or other activity while asleep. The normal sleep cycle involves distinct stages from light drowsiness to deep sleep. In Rapid eye movement (REM) sleep, the eyes move rapidly and vivid dreaming is most common. During the night, there will be several cycles from non-REM and REM sleep.

Sleepwalking will mostly occur in the non_REM stage of sleep. These are stages 3 and 4 of the sleep cycle. Most often sleepwalking occurs early in the night. Occasionally, sleepwalking happens in REM sleep close to early morning. Sleepwalking is most common in children 6 to 12 years old.