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 | 27.2 | 0.6 |
| Thu 3 | 27.1 | 0.6 |
| Fri 4 | 26.6 | 0.6 |
| Sat 5 | 26.1 | 0.6 |
| Sun 6 | 26.1 | 0.6 |
| Mon 7 | 26.4 | 0.6 |
| Tue 8 | 26.9 | 0.6 |
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: Not classified2019
- 2020: Not classified2020
- 2021: Not classified2021
- 2022: Not classified2022
- 2023: Not classified2023
- 2024: Not classified2024
- 2025: Not classified2025
Not classified in the most recent season, and 4 of 4 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 | Not classified |
| 2020 | Not classified |
| 2021 | Not classified |
| 2022 | Not classified |
| 2023 | Not classified |
| 2024 | Not classified |
| 2025 | Not classified |
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 | 14 |
| Feb | 14 |
| Mar | 14 |
| Apr | 17 |
| May | 19 |
| Jun | 22 |
| Jul | 24 |
| Aug | 25 |
| Sep | 24 |
| Oct | 22 |
| Nov | 19 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- Etang de Hirbach5.6 kmMoselle
- Centre de Loisirs Keskastel14 kmBas-Rhin
- 21 km
- Etang de Mittersheim21 kmMoselle
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- Easy by car — there's parking close to the beach.
Food, stays & town
- Nearest village: Saint-Jean-Rohrbach, about ~2.1 km away.
- 1 place to eat within 1 km
What kind of beach is this?
With no facilities mapped nearby, this beach is usually on the quiet side even in season — worth knowing if you're after solitude, but also worth bringing your own water and shade.
Estimated from OpenStreetMap surroundings data (ODbL).
- A quiet swim
Is the water clean at Etang de Diefenbach?
Thinking of swimming at Etang de Diefenbach? The short answer: its official EU Bathing Water rating for 2025 is Not classified — not enough samples in this year to assign an official rating. 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. You can park about ~150 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. That rating has been consistent: every one of the 4 classified seasons on record has come back Excellent or Good. On site you'll find Parking and Benches. Saint-Jean-Rohrbach — the closest town — sits about ~2.1 km from here.
“Not classified” 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.
Frequently asked questions
Is Etang de Diefenbach a safe beach for swimming?
Caution is advised. Its official 2025 rating is Not classified; check for local advisories and posted flags before swimming.
Is the sea warm at Etang de Diefenbach today?
That's placeholder data, not a live measurement: Etang de Diefenbach'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 Moselle.
Which month has the warmest sea at Etang de Diefenbach?
July–September is typically the most reliable swimming window, with the sea usually warmest in the second half of summer. That applies to the water around Moselle.
How is the water quality rating measured?
The grade comes from a full season of official sampling for intestinal enterococci and E. coli, reported to the European Environment Agency each spring under the EU Bathing Water Directive, which assigns Excellent, Good, Sufficient or Poor. Some countries (Croatia, via IZOR) also publish individual in-season samples ahead of that report; Etang de Diefenbach doesn't have that feed yet.
How do I get to Etang de Diefenbach without a car?
By car, it's easy — parking is right by the beach. The nearest town is Saint-Jean-Rohrbach, about ~2.1 km away.