Île de Sein Island

Small Breton island off Finistère with seafaring history

Île de Sein off Brittany is a small granite island reached by ferry from Audierne; visitors walk narrow lanes, study maritime history and watch seabirds from exposed headlands.

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Île de Sein at a Glance#

Address: Île de Sein, off the Pointe du Raz, Finistère, Brittany, France

About Île de Sein#

Île de Sein is a small island off the western tip of Brittany in the Finistère department of France, located just off Pointe du Raz. The island is low, rocky and exposed to Atlantic weather, with a single compact village and a long tradition of fishing and seamanship.

The settlement on the island features granite houses and maritime infrastructure; services for visitors are minimal and the island is generally accessed by scheduled ferry from coastal ports during the navigation season. Île de Sein is noted for its local history, including a well-known act of solidarity with the Free French in 1940 during the Second World War.

The island lies in the Bay of Biscay off the coast of western Brittany and is administratively part of Finistère.

  • Access and character: Small, low-lying island off the coast of Finistère known for a compact village, granite houses and a strong maritime heritage; regular ferries operate in season from Audierne and other nearby ports.
  • World War II history: Residents of the island famously volunteered en masse to join General de Gaulle and the Free French in 1940, a noted episode in local wartime history.

How to Get to Île de Sein#

Ferries to Île de Sein run from Audierne (Pointe du Raz area) in season; crossings take roughly one hour depending on sea conditions. Check seasonal timetables and weather advisories before travel.

Tips for Visiting Île de Sein#

  • Take the morning ferry from Audierne for calmer seas and clear light on approach.
  • Walk the island's west coast-lighthouse views and rock pools are best at low tide.
  • Bring cash and supplies; shops are limited and close early outside high season.

Best Time to Visit Île de Sein#

Summer offers the best access by ferry and the fullest services; shoulder seasons are quieter but services shrink.

Summer
June-August · 12-20°C
Mild weather and regular ferry service from Audierne; island activities and visitor services are active.
Late spring / early autumn
May; September · 10-16°C
Fewer visitors and good walking conditions; some services begin to reduce outside July-August.

Weather & Climate near Île de Sein#

Climate

Temperate climate with mild summers (peaking in August) and cold winters (coldest in February). Temperatures range from 7°C to 19°C. Abundant rainfall (1018 mm/year), wettest in January.

Air Quality: AQI 28 Good
Temperature & Rainfall
Temperature Range
19°
Warmest Month
7°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January - 7° - 11° 5° 130 mm - - 8.9 m/s - -
February - 7° - 10° 4° 105 mm - - 8.0 m/s - -
March - 7° - 11° 6° 85 mm - - 7.6 m/s - -
April - 8° - 12° 7° 64 mm - - 7.0 m/s - -
May - 10° - 14° 12° 60 mm - - 6.5 m/s - -
June - 13° - 16° 14° 49 mm - - 5.8 m/s - -
July - 14° - 18° 16° 41 mm - - 5.5 m/s - -
August - 14° - 19° 16° 55 mm - - 5.4 m/s - -
September - 13° - 18° 15° 77 mm - - 5.9 m/s - -
October - 12° - 15° 14° 100 mm - - 7.3 m/s - -
November - 9° - 13° 11° 123 mm - - 8.2 m/s - -
December - 8° - 12° 6° 129 mm - - 8.5 m/s - -