France · Côtes-d'Armor
Retenue Du Corong
Côtes-d'Armor, France
On the beach
Right now
Sample dataIllustrative conditions — the live Open-Meteo marine feed wasn't reachable, so these are deterministic placeholder values that will be replaced automatically once the feed is available.
7-day outlook
Sample dataModeled placeholder forecast for demonstration — will be replaced by a live marine-weather feed.
Sea temperature
Next 7 days, °C
Wave height
Next 7 days, metres
View as table
| Day | Sea temp (°C) | Wave height (m) |
|---|---|---|
| Wed 2 | 27.7 | 0.4 |
| Thu 3 | 27.7 | 0.4 |
| Fri 4 | 27.3 | 0.5 |
| Sat 5 | 26.8 | 0.5 |
| Sun 6 | 26.5 | 0.4 |
| Mon 7 | 26.7 | 0.4 |
| Tue 8 | 27.2 | 0.4 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Excellent2015
- 2016: Excellent2016
- 2017: Excellent2017
- 2018: Excellent2018
- 2019: Excellent2019
- 2020: Excellent2020
- 2021: Excellent2021
- 2022: Excellent2022
- 2023: Excellent2023
- 2024: Excellent2024
- 2025: Sufficient2025
Sufficient in the most recent season, and 10 of 11 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Excellent |
| 2016 | Excellent |
| 2017 | Excellent |
| 2018 | Excellent |
| 2019 | Excellent |
| 2020 | Excellent |
| 2021 | Excellent |
| 2022 | Excellent |
| 2023 | Excellent |
| 2024 | Excellent |
| 2025 | Sufficient |
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 | 23 |
| Oct | 22 |
| Nov | 19 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- Etang Des Sources - Kervougard7.2 kmCôtes-d'Armor
- Ar Lann Vras8.5 kmMorbihan
- Etang de Pontigou14 kmMorbihan
- Etang Du Bel Air18 kmMorbihan
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- Easy by car — there's parking close to the beach.
- Bus stop: Centre de Loisirs, about ~40 m away.
Food, stays & town
- Nearest village: Glomel, about ~600 m away.
- 1 place to eat within 1 km Closest is Le Korong, about ~560 m away.
- 2 places to stay mapped nearby Closest is Camping municipal du Korong, about ~170 m away.
- 1 shop nearby, about ~520 m 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).
- Families
- Water sports
Is the water clean at Retenue Du Corong?
Thinking of swimming at Retenue Du Corong? The short answer: its official EU Bathing Water rating for 2025 is Sufficient — meets the minimum EU standard in the latest annual assessment. That rating is set once a year under the EU Bathing Water Directive, from a full season of testing for intestinal enterococci and E. coli reported to the European Environment Agency the following spring, so the 2025 season's grade appeared in spring 2026 and the 2026 season won't be graded 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. Worth noting: the rating slipped from Excellent to Sufficient in 2025, so it's especially worth checking the latest local advisories. You can park about ~140 m away.
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. Over the 11 classified seasons on record, 10 have come back Excellent or Good — a track record worth checking each year rather than assuming. On site you'll find Toilets, Kids' area, and Parking. Glomel — the closest town — sits about ~600 m from here.
“Sufficient” is one point on a four-step scale — Excellent, Good, Sufficient or Poor — assigned once per year from that season's water samples, not a live reading. It describes how the site performs on average across the season, not the exact water quality this afternoon; for day-to-day sea conditions, see the “Right now” and 7-day outlook panels above. There's 1 place to eat near the beach — Le Korong, about ~560 m away.
Frequently asked questions
Can you safely swim at Retenue Du Corong?
It's rated to swim, but only just: Retenue Du Corong's 2025 classification is Sufficient, the minimum passing grade, so it's worth checking posted advisories first.
Is the sea warm at Retenue Du Corong today?
That's placeholder data, not a live measurement: Retenue Du Corong's marine-weather feed couldn't be reached, so the panel above is showing an estimated ~27°C until the real feed comes back. That's the reading right off Côtes-d'Armor.
What's the best month to visit Retenue Du Corong for swimming?
July–September tends to be the sweet spot for swimming here, with sea temperatures usually peaking later in that stretch. That applies to the water around Côtes-d'Armor.
How is the water quality rating measured?
National authorities sample the water for intestinal enterococci and E. coli bacteria through the bathing season and report the full-season results to the European Environment Agency each spring for the season just finished, which assigns one of four annual classifications — Excellent, Good, Sufficient or Poor — under the EU Bathing Water Directive. Some national authorities, including Croatia's IZOR, also publish individual in-season sample results ahead of that annual report.
How do you get to Retenue Du Corong?
By car, it's easy — parking is right by the beach. By bus, the nearest stop is Centre de Loisirs, about ~40 m away. The nearest town is Glomel, about ~600 m away.