Lac de Trémelin
Brittany, France
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.
Quick Overview
Plan Your Visit to Lac de Trémelin
The key facts before you go
About the Beach
What is Lac de Trémelin?
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.
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 | 11°C | Low |
| Feb | 7°C | 10°C | Low |
| Mar | 8°C | 10°C | Low |
| Apr | 10°C | 12°C | Med |
| May | 14°C | 14°C | Med |
| Jun | 17°C | 16°C | Med |
| Jul | 19°C | 18°C | High |
| Aug | 19°C | 19°C | High |
| Sep | 16°C | 18°C | Med |
| Oct | 13°C | 16°C | Low |
| Nov | 9°C | 14°C | Low |
| Dec | 7°C | 13°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 17.8°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 latest official class is Excellent (2025).
Water quality
Excellent (2025)
Earlier seasons: 2024 Excellent, 2023 Excellent, 2022 Excellent.
Excellent is the top class under the EU Bathing Water Directive. Recent samples stayed inside the strictest limits for bacteria.
Source: European Environment Agency
What is the water temperature at Lac de Trémelin?
Peak water temperature at Lac de Trémelin reaches around 17.8°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.
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), 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.
Nearby
Near Lac de Trémelin
Mapped toilets, bus stops, cafés, parking, and shops within about 500 m of Lac de Trémelin. Distances are walking-line estimates from the beach pin.
Map loads when you ask. Tiles stay off the first paint.
Map: OpenStreetMap (ODbL)
Toilets near Lac de Trémelin
- Public toilets Public toilets 36 m
- Public toilets Public toilets 192 m
- Public toilets Public toilets 215 m
- Public toilets Public toilets 268 m
- Public toilets Public toilets 370 m
Cafés near Lac de Trémelin
- Restaurant du Lac Restaurant 70 m
Parking near Lac de Trémelin
- 3 Parking 216 m
- Parking Parking 260 m
- 2 Parking 269 m
- P1 Parking 302 m
Source: © OpenStreetMap contributors (ODbL). Names and positions come from mapped OSM features. Confirm on site.
On the beach
Facilities at Lac de Trémelin
- Toilets
- Yes
- Showers
- No
- Drinking water
- Yes
- Parking
- Available nearby (surface parking). 154 m away, no parking fee
- Surface
- Sand
These details can change. Check on arrival.
Map data © OpenStreetMap contributors
Practical Details
Practical Information
| At the Beach | |
| Official Season | August – August |
|---|---|
| Beach Type | Coastal beach |
| Visiting Information | |
| GPS Coordinates | 48.1003°N, 2.0298°W |
| Water Quality | Excellent (2025) (EU Bathing Water Directive) |
| 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. It is Blue Flag certified in France. Families should still check what is open on the day.
Is Lac de Trémelin free to access?
An entry fee is not listed for Lac de Trémelin. Check with the beach operator before you travel. 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 17.8°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. The latest official class is Excellent (2025).
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), 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.
Are there toilets near Lac de Trémelin?
Yes. OpenStreetMap maps 5 toilet locations near Lac de Trémelin, including 36 m away, 192 m away, 215 m away, and 268 m away.
Distances are walking-line estimates within about 500 m of the beach pin. Confirm opening hours on site; some facilities are seasonal. © OpenStreetMap contributors (ODbL).
Are there cafés near Lac de Trémelin?
Yes. OpenStreetMap lists a café or restaurant near Lac de Trémelin, including Restaurant du Lac (70 m).
Hours and seasonal opening are not verified here. Check on the day. © OpenStreetMap contributors (ODbL).
Is there parking near Lac de Trémelin?
Yes. OpenStreetMap maps parking 216 m from Lac de Trémelin (3), with 4 lots or spaces inside about 500 m. Charges and time limits are not recorded here. © OpenStreetMap contributors (ODbL).
Explore More
Nearby Blue Flag Beaches
Editorial
From the Zeach Blog
Everything you need to know about what makes a beach qualify for Blue Flag status, from water quality to environmental education.
Read moreOur editorial team's pick of the standout Blue Flag beaches in France, rated for family friendliness, scenery, and facilities.
What the flag actually means, how certification works, and why a Blue Flag is a genuinely reliable signal, not just a marketing tool.
Read moreSources
- Foundation for Environmental Education: Blue Flag programme
- FEE site listing for Lac de Trémelin
- FEE France (Pavillon Bleu)
Last verified September 2026. National operator pages and FEE listings are the primary certification sources.