Some of the more popular birthday restaurants having a terrace in Douarnenez according to TheFork users include:
Le Clos de Vallombreuse, with a 8.1 rating
Le Goyen, with a 8.8 rating
Latitude Ouest, with a 7.3 rating
Is your birthday fast approaching? Allow yourself to be spoiled on your special day! Blow your candles out in one of the many restaurants in your city. "Haaappy Biiiirthday to youuu..."