Nani will join the Yellow Canaries on a three-year contract worth €3.975 million, according to a close Turkish-football.com source.
The Portuguese international winger will be unveiled by Fenerbahçe at 18:00 local time at the Şükrü Saracoğlu stadium the club revealed.
Fenerbahçe released a statement on their official website confirming the news and also announced that the signing ceremony will be open to the public.
Nani landed at the Sabiha Gökçen airport in Istanbul on a private jet yesterday and was welcomed to the city by hundreds of Yellow Canaries supporters.
Thousands of Fenerbahçe supporters are expected to fill the stands at the Şürkrü Saracoğlu stadium to welcome Nani to the club.
The 28-year-old winger will move to the press room after the ceremony to take questions from reporters.