Blue Flag Certified

Lac de Trémelin

Brittany, France

Atlantic Ocean

Written by Lotte Hansen | Edited by Arjun Nair, Coastal Research Editor | Updated September 2026

48.1003°N, 2.0298°W

Lac De Tremelin is a beach in Brittany, France, 3.22 km from Iffendic. It holds a Blue Flag award, which means the water quality, environmental standards, and visitor safety meet strict criteria set by the Foundation for Environmental Education.

Certification Blue Flag 2026

Activities Family

Experience

Practical Free Entry Parking Toilets

Quick Overview

Plan Your Visit to Lac de Trémelin

The key facts before you go

Blue Flag

Certified 2026

FEE annual certification

Water Quality

Blue Flag Standard

EU Bathing Water Directive

Best Season

April, May, June

See season guide below

Location

Iffendic

3.22 km from Iffendic

Facilities

WC · Parking

Free entry · Open beach

Family Score

3/10

Based on facilities & safety data

About the Beach

What is Lac de Trémelin?

The best time to visit is April through June, when crowds are lighter. July and August are peak season and much busier. Before swimming, check local water safety conditions.

The beach welcomes visitors throughout the season and is a solid choice for families and swimmers looking for a clean, well-maintained lake beach.

It sits alongside Blue Flag beaches in Brittany, part of a broader network of Blue Flag certified beaches across France certified annually by the Foundation for Environmental Education.

Planning

When to Go: Month by Month

Month	Air Temp	Water Temp	Crowds
Jan	6°C	3°C	Low
Feb	7°C	4°C	Low
Mar	8°C	5°C	Low
Apr	10°C	7°C	Med
May	14°C	11°C	Med
Jun	17°C	14°C	Med
Jul	19°C	16°C	High
Aug	19°C	16°C	High
Sep	16°C	13°C	Med
Oct	13°C	10°C	Low
Nov	9°C	6°C	Low
Dec	7°C	4°C	Low

When is the best time to visit Lac de Trémelin?

The best time to visit Lac de Trémelin is April, May, June. Air temperatures peak around 18.7°C in summer. Peak water temperature reaches 15.7°C in July.

How crowded does Lac de Trémelin get?

Like most Blue Flag beaches in France, Lac de Trémelin sees its highest visitor numbers in July and August. The beach maintains a pleasant atmosphere even in peak season.

Is Lac de Trémelin open year-round?

The beach itself is accessible year-round, though staffed facilities including lifeguards typically operate only during the official season (typically July–September). The Blue Flag is displayed during the certification period only.

The Water

Swimming and Beach Life at Lac de Trémelin

Is Lac de Trémelin safe to swim?

Lac de Trémelin is Blue Flag certified, which requires meeting strict bathing water standards set by the EU Bathing Water Directive. The beach does not have lifeguards stationed on the beach. Swim with appropriate caution.

What is the water temperature at Lac de Trémelin?

Peak water temperature at Lac de Trémelin reaches around 15.7°C in July, making it comfortable for swimming during the summer months. In winter (January), air temperatures average 5.9°C.

What is the beach like at Lac de Trémelin?

Lac de Trémelin on the Brittany coast of France. The best time to visit is April through June, when crowds are lighter. July and August are peak season and much busier. Before swimming, check local water safety conditions.

Does Lac de Trémelin have good facilities?

As a Blue Flag certified beach, Lac de Trémelin meets the Foundation for Environmental Education's standards for facilities and services. Toilet facilities are on site. Parking is available nearby.

Lac de Trémelin sits on the Atlantic Ocean: explore all Blue Flag beaches on the Atlantic.

Planning a trip to France? Blue Flag Beaches France , our editorial guide to certified beaches across the country.

Transport

Getting to Lac de Trémelin

How do I get to Lac de Trémelin by car?

Lac de Trémelin is approximately 3.22 km from Iffendic. Follow local road signs to the beach. Check Google Maps or a local map for the most current directions.

What is the nearest airport to Lac de Trémelin?

The nearest airport is Rennes-Saint-Jacques Airport (RNS) (RNS), approximately 22.2 km away.

Can I get to Lac de Trémelin by public transport?

Public transport options vary by season. Check local transport authority websites for current bus and train schedules connecting to Iffendic.

Is there a train to Lac de Trémelin?

Lac de Trémelin lists Montfort-sur-Meu as the nearest railway station, 7.39 km away. Check current timetables before travelling.

Map

Find Lac de Trémelin

Open the map or get directions to the Lac de Trémelin pin. Amenity names are listed here only when OpenStreetMap has a mapped feature nearby.

Get directions Apple Maps

Map loads when you ask. Tiles stay off the first paint.

Map: OpenStreetMap (ODbL)

Practical Details

Practical Information

At the Beach
Entry	Free: no charge to access the beach
Lifeguards	✗
Showers	✗
Toilets	✓ Available during season
Beach Type	Coastal beach
Parking	✓ Available nearby (surface parking)
Visiting Information
GPS Coordinates	48.1003°N, 2.0298°W
Blue Flag Operator	Foundation for Environmental Education (FEE), France

Frequently Asked Questions

Lac de Trémelin FAQ

Is Lac de Trémelin suitable for children?

Lac de Trémelin has a child-friendly score of 3/10. Facilities include toilets and parking. It is Blue Flag certified in France.

Is Lac de Trémelin free to access?

Access to Lac de Trémelin is free. There are no entry fees to enter the beach. It is a Blue Flag certified beach in Brittany, France, recognised for meeting international standards for water quality and environmental management.

When is the best time to visit Lac de Trémelin?

The best time to visit Lac de Trémelin is April, May, June. The peak season typically runs High season: July, August, when weather conditions and facilities are at their best. Peak water temperature reaches around 15.7°C in July. Outside peak season, the beach is quieter but some facilities may be reduced.

What is the water quality at Lac de Trémelin?

Lac de Trémelin is Blue Flag certified, which requires meeting strict EU Bathing Water Directive standards. Blue Flag certification is awarded and reviewed annually by the Foundation for Environmental Education (FEE). Beaches must pass water quality tests throughout the season to retain their status.

How do I get to Lac de Trémelin?

Lac de Trémelin is located in Brittany, France. It is approximately 3.22 km from Iffendic. The nearest airport is Rennes-Saint-Jacques Airport (RNS) (RNS), 22.2 km away. By car is the most flexible option. Check local transport authority websites for current bus and train schedules to the area.

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