Difference time between Guinea Bissau and Sao Tome and Principe in hours, minutes, and seconds is [ ] with gregorian date today is Friday 21st of August 2026 in Guinea Bissauan local time, Where the time now in Guinea Bissau is 06:29 AM and the time now in Sao Tome and Principe is 06:29 AM in Sao Tomean local time and the time comparison between Republic of Guinea-Bissau and Sao Tome and Principe in greenwich time ( GMT ) where Guinea Bissau advanced about greenwich time ( GMT +00:00 ) while Sao Tome and Principe he has the same greenwich time ( GMT +00:00 ).