Barnenez

Archaeological Site Massive Neolithic burial mound in Brittany

On Brittany’s north coast, Barnenez preserves one of Europe’s earliest megalithic cairns; visitors inspect Neolithic passage graves, low stone chambers and coastal walking paths above the Bay of Morlaix.

Main image

Barnenez, commonly called the Barnenez cairn, is a monumental Neolithic burial mound on the northern coast of Brittany in northwestern France. It dates to the early Neolithic and is one of the region’s most important megalithic sites.

The site comprises two joined cairns containing multiple passage graves and internal burial chambers constructed of large dressed stones, with a long earthen and stone mound above. Stone facings and internal corbelled chambers are visible in the restored monument.

Archaeological investigation has shown the monument was built in the early Neolithic and used for collective burials; it has been studied and conserved since the 19th and 20th centuries. The cairn has undergone excavation, repair and partial reconstruction to stabilise and present the chambers to visitors.

Barnenez sits on a headland overlooking Morlaix Bay in the Brittany region, close to the village of Plouezoc’h and accessible by local roads from nearby towns.

  • Antiquity: Built in the early Neolithic period, it is among the oldest known megalithic burial monuments in Atlantic Europe and predates many other famous European passage tombs.

What to See #

  • Dual cairns and passage graves: The monument is composed of two adjoining cairns containing multiple passage graves and burial chambers set into a long earthen mound dating to the Neolithic.
  • Masonry and chambers: Carved and dressed stone facings and internal corbelled chambers show early megalithic construction techniques and preservation of Neolithic masonry work.
Barnenez
Le Cairn de Barnenez, Plouezoc'h, Finistère, Brittany, France
48.6675, -3.8586
Seasonal: generally daily 9:30am-6:00pm in summer, reduced hours in winter
Adult ~€7-10 (varies by season); reduced rates for children/seniors

How to Get to Barnenez #

Barnenez is near Plouezoc’h in northern Finistère. Drive from Morlaix (about 20 minutes) via D52; local signage guides visitors to the site. Limited parking is available; the site is a short walk from the car park to the cairn.

Tips for Visiting Barnenez #

  • Wear sturdy footwear: interior passages and cairn pathways are uneven and can be slippery after rain.
  • Visit early to avoid coach groups and to enjoy the light across the Atlantic-facing stones.
  • Spend time in the small interpretive center - it provides crucial context on Neolithic construction and the later restoration.

Best Time to Visit Barnenez #

Summer offers the easiest access and longest hours; shoulder seasons provide a quieter, more atmospheric visit.

Summer
June-August · 12-20°C (54-68°F)
Longest opening hours and best light for photographing the cairn's megalithic faces.
Spring and autumn
April-May, September-October · 8-16°C (46-61°F)
Cooler, quieter visits with a sharper Atlantic wind and more atmospheric skies.

Weather & Climate near Barnenez #

Climate

Barnenez's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in August) and cold winters (coldest in January). Temperatures range from 4°C to 21°C. Moderate rainfall (975 mm/year).

Air Quality: AQI 33 Good
Best Time to Visit
JulyAugustJune
Temperature & Rainfall
Temperature Range
37°
Warmest Month
-6°
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 9°C and lows of 5°C. Significant rainfall (119 mm), mostly overcast skies, and breezy conditions.

48 Poor

Comfort

Feels Like Cold
C
Temperature
91%
Humidity
Very Humid

Weather

119 mm
Rainfall
6.8 m/s
Wind
Breezy
0.1
UV Index
Low
8.6h daylight

February

February is the coolest month with highs of 10°C and lows of 4°C. Regular rainfall (97 mm), mostly overcast skies, and breezy conditions.

50 Acceptable

Comfort

Feels Like Cold
C
Temperature
10°
89%
Humidity
Very Humid

Weather

97 mm
Rainfall
6.6 m/s
Wind
Breezy
0.2
UV Index
Low
10.0h daylight

March

March is cold with highs of 11°C and lows of 5°C. Regular rainfall (83 mm), mostly overcast skies, and breezy conditions.

50 Acceptable

Comfort

Feels Like Cold
C
Temperature
11°
87%
Humidity
Very Humid

Weather

83 mm
Rainfall
6.2 m/s
Wind
Breezy
0.5
UV Index
Low
11.7h daylight

April

April is cold with highs of 12°C and lows of 6°C. Moderate rainfall (63 mm), partly cloudy skies, and breezy conditions.

56 Acceptable

Comfort

Feels Like Cold
C
Temperature
13°
84%
Humidity
Very Humid

Weather

63 mm
Rainfall
6.0 m/s
Wind
Breezy
0.9
UV Index
Moderate
13.5h daylight

May

May is cool with highs of 16°C and lows of 9°C. Moderate rainfall (60 mm) and partly cloudy skies.

68 Good

Comfort

12°
Feels Like Cool
12°C
Temperature
16°
83%
Humidity
Very Humid

Weather

60 mm
Rainfall
5.5 m/s
Wind
Light Breeze
1.3
UV Index
High
15.0h daylight

June

June is cool with highs of 18°C and lows of 11°C. Moderate rainfall (50 mm) and partly cloudy skies.

70 Very Good

Comfort

15°
Feels Like Cool
15°C
Temperature
11° 18°
82%
Humidity
Very Humid

Weather

50 mm
Rainfall
5.0 m/s
Wind
Light Breeze
1.5
UV Index
Very High
15.8h daylight

July

July is cool with highs of 20°C and lows of 13°C. Moderate rainfall (43 mm) and partly cloudy skies.

74 Very Good

Comfort

17°
Feels Like Cool
17°C
Temperature
13° 20°
79%
Humidity
Very Humid

Weather

43 mm
Rainfall
4.9 m/s
Wind
Light Breeze
1.5
UV Index
Very High
15.5h daylight

August

August is cool with highs of 21°C and lows of 13°C. Moderate rainfall (52 mm) and partly cloudy skies.

72 Very Good

Comfort

17°
Feels Like Cool
17°C
Temperature
13° 21°
79%
Humidity
Very Humid

Weather

52 mm
Rainfall
4.7 m/s
Wind
Light Breeze
1.2
UV Index
High
14.1h daylight

September

September is cool with highs of 19°C and lows of 12°C. Moderate rainfall (74 mm) and partly cloudy skies.

70 Very Good

Comfort

15°
Feels Like Cool
15°C
Temperature
12° 19°
80%
Humidity
Very Humid

Weather

74 mm
Rainfall
5.2 m/s
Wind
Light Breeze
0.8
UV Index
Moderate
12.4h daylight

October

October is cool with highs of 15°C and lows of 10°C. Regular rainfall (97 mm) and mostly overcast skies.

62 Good

Comfort

13°
Feels Like Cool
13°C
Temperature
10° 15°
85%
Humidity
Very Humid

Weather

97 mm
Rainfall
5.7 m/s
Wind
Light Breeze
0.4
UV Index
Low
10.7h daylight

November

November is cold with highs of 12°C and lows of 7°C. Significant rainfall (115 mm), mostly overcast skies, and breezy conditions.

48 Poor

Comfort

10°
Feels Like Cold
10°C
Temperature
12°
89%
Humidity
Very Humid

Weather

115 mm
Rainfall
6.2 m/s
Wind
Breezy
0.1
UV Index
Low
9.1h daylight

December

December is cold with highs of 10°C and lows of 6°C. The wettest month with heavy rain (122 mm), mostly overcast skies, and breezy conditions.

48 Poor

Comfort

Feels Like Cold
C
Temperature
10°
91%
Humidity
Very Humid

Weather

122 mm
Rainfall
6.6 m/s
Wind
Breezy
0.1
UV Index
Low
8.2h daylight

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