Coastguard / sea rescue196

17112

Emergency · France

En mer : VHF canal 16

The beach can be dangerous. Wind, swell, tides and access can change quickly. Keep a way back and check official notices.

In immediate danger, contact the official emergency services. Mareloa does not replace emergency services or local signs.

Sources : Ministère de la Mer · Service-Public.fr · Service-Public · numéros d’urgence

Emergency

Emergency · France

En mer : VHF canal 16

The beach can be dangerous. Wind, swell, tides and access can change quickly. Keep a way back and check official notices.

In immediate danger, contact the official emergency services. Mareloa does not replace emergency services or local signs.

Sources : Ministère de la Mer · Service-Public.fr · Service-Public · numéros d’urgence

La Grande Plage, Ille-et-VilaineSaint-Lunaire

Coastguard / sea rescue196

17112

Emergency · France

En mer : VHF canal 16

The beach can be dangerous. Wind, swell, tides and access can change quickly. Keep a way back and check official notices.

In immediate danger, contact the official emergency services. Mareloa does not replace emergency services or local signs.

Sources : Ministère de la Mer · Service-Public.fr · Service-Public · numéros d’urgence

Emergency

Emergency · France

En mer : VHF canal 16

The beach can be dangerous. Wind, swell, tides and access can change quickly. Keep a way back and check official notices.

In immediate danger, contact the official emergency services. Mareloa does not replace emergency services or local signs.

Sources : Ministère de la Mer · Service-Public.fr · Service-Public · numéros d’urgence

La Grande Plage, Ille-et-Vilaine

Near Saint-Lunaire · 0.4 km

6 beaches near this one

Practical information

Tide

NowTide unavailable—

Next eventTide curve unavailable—

Tide curve unavailable

Sea conditions

sea model sampled 17 km from the beach

Estimated surface05:00 AM: ≈ 16.3 °C
Waves: 1.4 m
Period: 4.5 s
Swell: 0.4 m W
Modelled current: 1.3 km/h

Surface temperature · 24 h≈ 15.8 °C – 16.3 °C

06:00 AM16.3 °C

11:00 AM16.2 °C

05:00 PM16.0 °C

11:00 PM15.9 °C

05:00 AM15.8 °C

Local conditions

Humidity: 85 %
UV: 0.0
Cloud cover: 100 %
Sunrise: 08:40 AM
Sunset: 07:04 PM

Hourly temperature forecast

This point remains readable, but it is outside the common selectable horizon.

Seven-day weather outlook

Surface: Sandrecorded by the source · Source record 9/15/2026 · Open source
Length: 546 mSource record 9/15/2026 · Open source
Shade features nearby: BuildingsNearby, does not guarantee shade on the beach.recorded by the source · Source record 9/15/2026 · Open source
Horizon (relief): N 2° · NE 0° · E 4° · SE 15° · S 15° · SW 17° · W 13° · NW 8°Relief only, excludes vegetation and buildings.Source record 9/15/2026 · Open source
Distance to town: 0.4 kmSource record 9/11/2026 · Open source
Shore axis: 113°Source record 9/15/2026 · Open source

Sun and shore orientation

October 23, 2026 · Estimated times · local time

Sunrise

08:38 AM

Shore orientation unavailable

Sunset

07:05 PM

Shore orientation unavailable

Calculation method

Wind on the beach

Wind at your back

estimate

Bathing supervision

Supervision not provided

Do you know this beach?

These answers come from visitors, not from a source we cite. They describe the place, not today's conditions.

Is the beach easy to reach?

Practical information recorded by the source

This information is source-recorded and may not describe the current situation.

Nearby services: toilets 6 · restaurant 9 · cafe 2 · shop 20 · bus stop 8recorded by the source · Source record 9/15/2026 · Open source
Playground nearby: 297 mSource record 9/27/2026 · Open source

Practical facilities

Mapped within 1,000 m of the beach reference point, as the crow flies.

Mapped facilities describe the source record; availability, opening and access can change.

Toilets, showers and water

6

Toilets
46 m from the beach reference point, as the crow flies.
Wheelchair access
Yes
Fee
No
Representative mapped point; not an entrance or route.
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Toilets
256 m from the beach reference point, as the crow flies.
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map

Show 4 more

Toilets
282 m from the beach reference point, as the crow flies.
Wheelchair access
No
Fee
No
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Toilets
318 m from the beach reference point, as the crow flies.
Wheelchair access
No
Fee
No
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Toilets
384 m from the beach reference point, as the crow flies.
Wheelchair access
No
Fee
No
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Toilets
746 m from the beach reference point, as the crow flies.
Wheelchair access
Yes
Fee
No
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map

Access and accessibility

—

Not documented.

Public transport and bikes

6

Bus stop · Point Info Tourisme
275 m from the beach reference point, as the crow flies.
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Bus stop · Cimetière
279 m from the beach reference point, as the crow flies.
Wheelchair access
No
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map

Show 4 more

Bus stop · Cimetière
281 m from the beach reference point, as the crow flies.
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Bus stop · Boulevard de la Plage
302 m from the beach reference point, as the crow flies.
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Bus stop · Saint-Lunaire/Boulevard de la Plage
459 m from the beach reference point, as the crow flies.
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Bus stop · Boulevard de la Plage
461 m from the beach reference point, as the crow flies.
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map

Parking

6

Car park
123 m from the beach reference point, as the crow flies.
Fee
No
Access
Yes
Representative mapped point; not an entrance or route.
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Car park
207 m from the beach reference point, as the crow flies.
Fee
No
Access
Customers
Representative mapped point; not an entrance or route.
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map

Show 4 more

Car park
253 m from the beach reference point, as the crow flies.
Fee
No
Access
Yes
Representative mapped point; not an entrance or route.
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Car park · Place d’Hexham
309 m from the beach reference point, as the crow flies.
Fee
No
Access
Yes
Representative mapped point; not an entrance or route.
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Car park
379 m from the beach reference point, as the crow flies.
Fee
No
Access
Yes
Representative mapped point; not an entrance or route.
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map
Car park
380 m from the beach reference point, as the crow flies.
Access
Private
Mapped point
Source · Data from Sep 14, 2026 · © OpenStreetMap contributors
Source details
Retrieved Sep 15, 2026
View on map

Show catalogue context

Local area: 035recorded by the source · Source record 8/25/2026 · Open source
Catalogue record: Designated bathing waterrecorded by the source · Source record 8/25/2026 · Open source
Coast: Bretagne nordSource record 8/25/2026 · Open source
Water body: SeaSource record 8/25/2026 · Open source

Today’s windows

Calculated at 05:29 AM

shore gatheringCheck first05:29 AM – 08:29 AM

shore gathering

Check first

05:29 AM – 08:29 AM

Before you go

Additional condition to check

Confidence 25 % · rules coast-v5

Sources Données météo par Open-Meteo.com

beach runCheck first08:00 AM – 09:30 AM

beach run

Check first

08:00 AM – 09:30 AM

Before you go

Additional condition to check

Confidence 35 % · rules coast-v5

Sources Données météo par Open-Meteo.com

coastal walkCheck first10:00 AM – 12:00 PM

coastal walk

Check first

10:00 AM – 12:00 PM

Before you go

Additional condition to check

Confidence 35 % · rules coast-v5

Sources Données météo par Open-Meteo.com

family beach timeCheck first02:00 PM – 05:00 PM

family beach time

Check first

02:00 PM – 05:00 PM

Before you go

latest health sample has expired
Additional condition to check

Confidence 0 % · rules coast-v5

Sources Données météo par Open-Meteo.com

photographyCheck first05:04 PM – 07:04 PM

photography

Check first

05:04 PM – 07:04 PM

Before you go

Additional condition to check

Confidence 35 % · rules coast-v5

Sources Données météo par Open-Meteo.com

sunsetCheck first06:19 PM – 07:49 PM

sunset

Check first

06:19 PM – 07:49 PM

Before you go

Additional condition to check

Confidence 35 % · rules coast-v5

Sources Données météo par Open-Meteo.com

Explore nearby

Beaches nearby

Longchamp Ouest, Ille-et-Vilaine

A very close alternative

Annual classification: Excellent

La Fosse Aux Vaults, Ille-et-Vilaine

A very close alternative

Annual classification: Excellent

Pymouss · CC BY-SA 4.0

La Fourberie, Ille-et-Vilaine

A very close alternative

Annual classification: Excellent

Pymouss · CC BY-SA 4.0

Port Blanc, Ille-et-Vilaine

A very close alternative

Annual classification: Excellent

Guigon Jean-Claude (TuLy?) · CC BY-SA 4.0

Port Hue, Ille-et-Vilaine

A very close alternative

Annual classification: Excellent

Le Bechet, Ille-et-Vilaine

A very close alternative

Annual classification: Excellent

Discovery score: distance, available annual classification and catalogue quality. It is neither real-time health advice nor a safety conclusion.

Seven-day tide

Modelled tidal range · source reference

Tide calendar

Tide and currents

Reflex

A baïne is a hollow in the sand filled with water that can create a current pulling out to sea: even a strong swimmer cannot fight it. Reflex: swim parallel to the shore to get out of it, never straight against it.

Source: SNSM (Sauveteurs en Mer)

Did you know

A sandbank can look stable and then be surrounded by the sea within minutes: between 1 May and 1 August 2025, CROSS Gris-Nez recorded 38 people cut off by the tide, notably around the Somme bay.

Source: Préfecture maritime de la Manche et de la mer du Nord

Did you know

In the Mont-Saint-Michel bay, the sea can rise by about 6 km/h: it is best never to venture in alone, and always to cross the bay with a guide.

Source: Normandie Tourisme

Official information

Ille-et-Vilaine

Santé / ARSCurrent status not provided

Annual classification : Excellent

Latest sample : Sep 10, 2025, 12:00 AMOpen the health profile ↗

An annual classification or the absence of an event in the feed does not mean bathing is currently permitted. Local signs and published orders take priority.

The place in pictures

View on Google Maps ↗

No freely licensed photograph of La Grande Plage has yet passed our location, licence and credit review.

Sources and method

Tide heights: Heights retain the vertical reference supplied by the source and are not an official hydrographic zero.
Sea temperature and conditions: Temperature and conditions come from a limited-resolution coastal model, not an observation at the beach. Do not use for navigation or to conclude that bathing is safe.
Beach characteristics: These place characteristics are recorded from the linked sources. They describe the place, not current conditions.

Source & freshness

Données météo par Open-Meteo.comFresh

Modelled data · Weather forecast

Method and source ↗Licence ↗

Données marines par Open-Meteo.comFresh

Modelled data · Marine forecast

Method and source ↗Licence ↗

Météo-France — Vigilance météorologique, Licence OuverteOutdated

Official regulation

Method and source ↗Licence ↗

Ministère des Solidarités et de la Santé — Données de rapportage de la saison balnéaire — mise à jour de la ressource data.gouv.frFresh

Official catalogue · Bathing water quality

Method and source ↗Licence ↗

Ministère des Solidarités et de la Santé — Données de rapportage de la saison balnéaire — mise à jour de la ressource data.gouv.frFresh

Official catalogue · Bathing water quality

Method and source ↗Licence ↗

Ministère des Solidarités et de la Santé — Données de rapportage de la saison balnéaire — mise à jour de la ressource data.gouv.frExpired

Official catalogue · Bathing water quality

Method and source ↗Licence ↗

EEA/WISE Bathing Water Quality 2025 et autorités nationales — classement annuel, pas un avis sanitaire actuelAging

Official catalogue · Bathing water quality

Method and source ↗Licence ↗

GeoNames gazetteer (cities500) — CC BY 4.0Fresh

Additional source

Method and source ↗Licence ↗

© OpenStreetMap contributors — OSM database base 2026-09-14T20:21:51Z; offline reviewed snapshot, ODbLFresh

Catalogue review

Method and source ↗Licence ↗

© OpenStreetMap contributors — OSM database base 2026-09-27T08:40:36Z; offline reviewed snapshot (companion profile), ODbLFresh

Catalogue review

Method and source ↗Licence ↗

Copernicus DEM GLO-30 -- (c) DLR e.V. 2010-2014 and Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; distributed via the AWS Open Data Registry (bucket copernicus-dem-30m).Fresh

Additional source

Method and source ↗

Copernicus DEM GLO-30 © DLR e.V. et Airbus DS, fourni par l'UE et l'ESAFresh

Copernicus DEM (elevation)

Method and source ↗Licence ↗

NOAA OISST v2.1 (NOAA PSL)Fresh

NOAA OISST (sea temperature)

Method and source ↗Licence ↗

© contributeurs OpenStreetMap (ODbL)Fresh

OpenStreetMap (coastline layout)

Method and source ↗Licence ↗

EOT20 — Hart-Davis et al. (2021), DGFI-TUM, CC BY 4.0Modelled reference

Modelled data · Tide model

Method and source ↗Licence ↗

Préfecture de Ille-et-Vilaine — source officielleUnavailable

Administrative directory

Method and source ↗

Vigilance Météo-France indisponible : Client error '404 Not Found' for url 'https://meteofrance.s3.sbg.io.cloud.ovh.net/data/vigilance/metropole/2026/10/22/200050/CDP_CARTE_EXTERNE.json' For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404.

Vigilance Météo-France servie depuis le cache.

Tide unavailable: the activities stay unknown.

GeoNames · CC BY 4.0

Modelled data and this estimate do not replace an official source. Mareloa is not a navigation tool.