The Compagnie Maritime Penn Ar Bed provides ferry services to the island of Sein every day, all year.

Port of Audierne

Crossing takes : 1 hour
The delights of this crossing start well before you’ve reached the famous green and white lighthouse. From Audierne, you’ll follow the coastline and cliffs of the Cap Sizun, see the famous Pointe du Raz coastal point from a whole new perspective across the waves and leave the iconic lighthouse ‘Phare de la Vieille’ in your wake.
The Penn Ar Bed ferry company provides daily crossings to Sein throughout the year.
More informations here

Port of Brest

Crossing takes : 90 minutes
Only in the summer a crossing is available every Sunday in July and August. 
Leaving from Brest at 9am, stopping at Camaret.
Return from Sein to Brest at leaving at 4pm.
More informations here

Port of Camaret

Crossing takes : Allow about 1 hour for the crossing
This crossing is only available in summer. Every Sunday from 30th June. Leaving at 9.40am with a return crossing from Sein at 5pm.
More informations here