France
Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
15.0km²
Area
33km
Coastline
46m
Highest point
2,310
People
18°C
Warmest sea
August
8km
To the mainland
When to go to Groix
Best to visit from July to August.
The sea is warmest in August (18 °C) and coolest in February (10 °C). The water never reaches 21 °C: bring a wetsuit.
Averages 1991–2020. Sea: NOAA OISST, the water within 35 km of the coast. Air, rain and sun: NASA POWER. Best months weigh warm afternoons (23–30 °C), sea of 24 °C or more and few wet days.
Island in Morbihan, France
Groix is an island in France. It covers 15.0 km², with 33 km of coastline. Its highest point rises to 46 m. About 2,310 people live on it. The nearest mainland is 8 km away.
Getting there
- Brest Bretagne airport (BES)nearest airport with scheduled flights · 115 km in a straight lineCar hire at BES airport (Brest)Discover Cars · Affiliate link↗
- FerriesLorient-Groix, Lorient La Base - Port Louis - Groix, Lomener - Île de Groix
- 8 km from the mainlanddistance to the nearest continental coast
- From July to Augustbest months to go (from 30 years of averages)
Plan the trip
Ferries, stays and things to do
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
On the island
What you find on Groix.
- 28beachesCrique naturiste, Plouziorek, Plage de Porz ar Roed and 25 more
- 11viewpointsPointe des Chats and 10 more
- 2lighthousesPhare de Pen-Men, Phare des Chats
- 3ferry terminalsTraversées Lomener - Île de Groix, Ferry Groix - Lorient, Doelan
- 7castles and fortsFort Surville, Batterie du Bas Grognon, Fort du Haut Grognon and 4 more
- 15ruins and archaeological sitesAllée couverte, Dolmens dits Men Cam et Men Yann, Camp des Vénètes and 12 more
- 5waymarked walking routesCircuit de Port Mélite/Le Mené, Circuit de Locmaria / Les Chats, Circuit du Trou de l'Enfer / Saint-Nicolas and 2 more
- 2campsitesCamping municipal de l'île de Groix, Camping des Sables Rouges
- 12hotels, guesthouses and apartments
- 27restaurants, cafés and bars
Counted in OpenStreetMap, the map anyone can edit, inside the island's outline. A low number may only mean nobody has mapped it yet.
Cross-checked with our atlases
Groix in our other atlases
Everything Coastya, Peakyas, Lakeyas and Cascadyas know about what lies inside Groix, each with its own numbers.
3beaches and covesCoastya
Beach with the warmest sea
18.3°C
Plage les Grands Sables
sea in the warmest month · according to Coastya
3 beaches
on Coastya, the beach atlas
- Plage les Grands Sables18.3°C
- Port Saint-Nicolascove18.3°C
- Port Melincove18.3°C
The shape of the land.
On average the island stands 31 m above the sea. 100 % of it is below 200 m.
- 100 %0–50 m
- <1 %50–200 m
Share of the island's area in each altitude band, from the Copernicus DEM (30 m, read at 30–240 m on large islands).
Size, for real
Next to islands you may know.
5 km
All outlines drawn to the same scale (Natural Earth and OpenStreetMap).
Towns on the island
- Groix2,429 people
Month by month
The weather on the island.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon high (°C) | 11 | 10 | 11 | 12 | 15 | 18 | 19 | 19 | 18 | 16 | 14 | 12 |
| Night low (°C) | 9 | 8 | 8 | 10 | 12 | 15 | 17 | 17 | 16 | 14 | 12 | 10 |
| Sea (°C) | 11 | 10 | 10 | 12 | 14 | 16 | 18 | 18 | 17 | 16 | 14 | 12 |
| Rain (mm) | 97 | 78 | 64 | 51 | 47 | 45 | 44 | 48 | 39 | 87 | 98 | 99 |
| Wet days | 16 | 12 | 12 | 12 | 11 | 9 | 10 | 9 | 10 | 14 | 16 | 16 |
| Sun h/day | 2.0 | 3.8 | 5.4 | 7.7 | 8.7 | 9.2 | 9.2 | 8.2 | 7.4 | 4.3 | 2.9 | 2.0 |
| Wind (km/h) | 30 | 29 | 26 | 23 | 21 | 20 | 20 | 20 | 21 | 25 | 29 | 30 |
Averages 1991–2020 for the ~55 km NASA POWER cell over the island; the sea from NOAA OISST.
Recent years
Warmer and cooler years at sea.
Each month's sea temperature compared with its 1991–2020 average, in degrees.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | +0.2 | +1.0 | +1.2 | +1.4 | +1.3 | +1.1 | +0.7 | +1.3 | +1.1 | −1.1 | +0.8 | +0.8 |
| 2021 | +0.2 | +0.2 | +0.4 | +0.1 | −0.6 | +1.2 | +0.2 | −0.2 | +1.1 | +0.3 | ±0.0 | −0.4 |
| 2022 | −0.9 | ±0.0 | +0.4 | +0.7 | +1.7 | +0.8 | +1.0 | −0.4 | +0.5 | ±0.0 | +1.2 | +0.5 |
| 2023 | +0.6 | −0.1 | +0.4 | +0.5 | +0.6 | +2.1 | −0.3 | −1.0 | +1.5 | +2.3 | +1.1 | +0.8 |
| 2024 | +0.6 | +1.0 | +1.6 | +1.2 | +1.2 | +0.3 | −0.5 | +0.2 | −0.7 | +0.1 | +0.5 | +0.1 |
| 2025 | −0.4 | −0.4 | +0.5 | +1.5 | +1.6 | +1.4 | +0.4 | −0.2 | ±0.0 | +0.5 | +0.6 | +0.7 |
+1 warmer than usual −1 cooler than usual
Photos
Seen by visitors.
Nearby
More islands nearby.
About these numbers
| Names, area, population | Wikidata (Q3593372) · CC0 |
|---|---|
| Outline | © OpenStreetMap contributors · ODbL |
| Sea temperature | NOAA OISST v2.1 · 1991–2020 |
| Climate | NASA POWER · 1991–2020 |
| Relief, 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Beaches, ports, lighthouses, trails | © OpenStreetMap contributors · ODbL |
| Towns | GeoNames · CC BY 4.0 |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Beaches, mountains, lakes and waterfalls | Coastya — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; NOAA OISST |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
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