I am performing Hajj and intend to travel tomorrow at noon. Is it permissible for me to perform the farewell Tawaaf (circumambulation) tonight before sleeping?

All perfect praise be to Allaah, the Lord of the worlds. I testify that there is none worthy of worship except Allaah and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.

The farewell Tawaaf must be performed immediately before departing Makkah. After performing it, one should do nothing but the preparations for departure. If you perform Tawaaf at night while knowing that you will depart Makkah at noon the next day, then your Tawaaf is not regarded as the farewell Tawaaf, and you will be required to make up for it. If you do not make up for it, then you will be required to offer a sacrificial animal for abandoning one of the obligatory acts of Hajj.

Allaah Knows best.