Difference time between French Guiana and Portugal in hours, minutes, and seconds is [ -4 hours ] with gregorian date today is Thursday 1st of October 2026 in French Guianese local time, Where the time now in French Guiana is 13:22 PM and the time now in Portugal is 17:22 PM in Portuguese local time and the time comparison between French Guiana and Portugal in greenwich time ( GMT ) where French Guiana late for greenwich time ( GMT -03:00 ) while Portugal advanced about greenwich time ( GMT +01:00 ).