France · Loire-Atlantique
Roche Marie
Loire-Atlantique, France
On the beach
Right now
Live conditions from Open-Meteo, refreshed hourly.
7-day outlook
7-day marine forecast from Open-Meteo.
Sea temperature
Next 7 days, °C
Wave height
Next 7 days, metres
View as table
| Day | Sea temp (°C) | Wave height (m) |
|---|---|---|
| Wed 2 | 21.9 | 0.3 |
| Thu 3 | 22.0 | 0.4 |
| Fri 4 | 22.2 | 0.4 |
| Sat 5 | 22.8 | 0.4 |
| Sun 6 | 22.7 | 0.6 |
| Mon 7 | 22.8 | 0.6 |
| Tue 8 | 22.6 | 0.9 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Excellent2015
- 2016: Good2016
- 2017: Excellent2017
- 2018: Excellent2018
- 2019: Good2019
- 2020: Excellent2020
- 2021: Excellent2021
- 2022: Excellent2022
- 2023: Excellent2023
- 2024: Excellent2024
- 2025: Good2025
Good in the most recent season, and 11 of 11 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Excellent |
| 2016 | Good |
| 2017 | Excellent |
| 2018 | Excellent |
| 2019 | Good |
| 2020 | Excellent |
| 2021 | Excellent |
| 2022 | Excellent |
| 2023 | Excellent |
| 2024 | Excellent |
| 2025 | Good |
Typical sea temperature by month
Modeled estimatePlausible seasonal climatology derived from latitude, for illustration — not a measured average.
Monthly sea temperature
Typical range across the year, °C
View as table
| Month | Typical sea temp (°C) |
|---|---|
| Jan | 15 |
| Feb | 14 |
| Mar | 15 |
| Apr | 17 |
| May | 19 |
| Jun | 22 |
| Jul | 23 |
| Aug | 24 |
| Sep | 24 |
| Oct | 22 |
| Nov | 20 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- La Boutinardiere898 mLoire-Atlantique
- Grande Plage Face Mairie1.0 kmLoire-Atlantique
- Plan D'Eau Maurice Giros1.3 kmLoire-Atlantique
- Face Av. Louis Gautier1.9 kmLoire-Atlantique
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- Easy by car — there's parking close to the beach.
- Nearest bus stop is about ~230 m away.
Food, stays & town
- Nearest village: La Bernerie-en-Retz, about ~1.1 km away.
What kind of beach is this?
This beach belongs to a small coastal village. It's usually calmer than a resort or town beach, though a popular village spot can still fill up on the best summer days.
Estimated from OpenStreetMap surroundings data (ODbL).
- Water sports
Is the water clean at Roche Marie?
Roche Marie is a coastal bathing site with an official EU Bathing Water rating of Good for the 2025 season — meets the EU bathing-water standard in the latest annual assessment. That annual classification comes from the EU Bathing Water Directive: national authorities test for two indicator bacteria, intestinal enterococci and E. coli, throughout the bathing season, then report the full-season results to the European Environment Agency (EEA) the following spring — the 2025 season's rating was published in spring 2026, and the 2026 season won't be rated until spring 2027. In addition to that yearly rating, some national authorities — for Croatia, the national environmental authority — publish individual water sample results during the season itself, ahead of the annual report. On site you'll find Parking, Sports facilities, and Benches. There's parking about ~220 m from the beach.
Looking to avoid the busiest weeks? The water is typically warmest around August, with the most reliable swimming window running July–September; outside that stretch you'll find a cooler sea but a quieter beach. That rating has been consistent: every one of the 11 classified seasons on record has come back Excellent or Good. The nearest town, La Bernerie-en-Retz, is about ~1.1 km away.
Worth remembering: “Good” isn't a live reading, it's an annual grade — Excellent, Good, Sufficient or Poor — set once a year from that season's water samples and describing the average, not this afternoon's conditions. For what the sea is doing right now, check the “Right now” panel and 7-day outlook above. It sits in Loire-Atlantique.
Frequently asked questions
Should you swim at Roche Marie?
Roche Marie passes comfortably — its 2025 EU Bathing Water rating is Good, and 11 of 11 classified seasons have rated Excellent or Good. That said, the rating slipped from Excellent to Good in 2025, so it's worth checking for current local advisories too.
What's the current water temperature at Roche Marie?
Roche Marie's sea temperature currently sits at around 22°C, based on the latest update — check the “Right now” panel above for the full live picture. That's the reading right off Loire-Atlantique. On the modeled climatology here, August usually runs warmest.
When does Roche Marie have the warmest water?
For swimming, July–September is usually the best call — that's the modeled window when the sea here runs warmest. That applies to the water around Loire-Atlantique. Within that window, August is typically the single warmest month.
Who measures the water quality rating, and how?
It's based on official water samples: authorities test for intestinal enterococci and E. coli through the season, then report the full-season results to the European Environment Agency each spring, which assigns one of four grades — Excellent, Good, Sufficient or Poor. A few national authorities, including Croatia's IZOR, also publish individual samples during the season itself, ahead of that annual report — that isn't yet available for Roche Marie.
What's the easiest way to reach Roche Marie?
By car, it's easy — parking is right by the beach. There's a bus stop about ~230 m from the beach. The nearest town is La Bernerie-en-Retz, about ~1.1 km away.