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 | 22.7 | 0.1 |
| Thu 3 | 22.2 | 0.1 |
| Fri 4 | 21.8 | 0.1 |
| Sat 5 | 21.7 | 0.1 |
| Sun 6 | 22.1 | 0.1 |
| Mon 7 | 22.7 | 0.1 |
| Tue 8 | 22.9 | 0.1 |
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: Excellent2025
Excellent 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 | Excellent |
| 2017 | Excellent |
| 2018 | Excellent |
| 2019 | Excellent |
| 2020 | Excellent |
| 2021 | Excellent |
| 2022 | Excellent |
| 2023 | Excellent |
| 2024 | Excellent |
| 2025 | Excellent |
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 | 20 |
| Jun | 23 |
| Jul | 25 |
| Aug | 25 |
| Sep | 25 |
| Oct | 23 |
| Nov | 20 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- 7.7 km
- 11 km
- 12 km
- 12 km
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- Easy by car — there's parking close to the beach.
- Bus stop: Clairvaux-Mairie, about ~850 m away.
Food, stays & town
- Nearest village: Clairvaux-les-Lacs, about ~700 m away.
- 12 places to eat within 1 km Closest is La Chaumière du Lac, about ~210 m away.
- 9 places to stay mapped nearby Closest is Le Grand Lac, about ~130 m away.
- 3 shops nearby, the closest about ~780 m away
What kind of beach is this?
This beach sits in a built-up resort setting, with hotels, restaurants and services clustered around it — a full-service stretch of coast that tends to be busy in peak season and quieter outside it.
Estimated from OpenStreetMap surroundings data (ODbL).
- Families
- Water sports
- Full-service days
Is the water clean at Grand Lac de Clairvaux?
Grand Lac de Clairvaux is a lake bathing site with an official EU Bathing Water rating of Excellent for the 2025 season — the highest official classification under the EU bathing-water 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 Sandy shore, Toilets, and Restaurant. You can park about ~200 m away.
That rating has been consistent: every one of the 11 classified seasons on record has come back Excellent or Good. If you're timing a visit around water temperature rather than crowds, July–September is the safest bet, with August typically the peak — expect a cooler, calmer sea either side of that stretch. Clairvaux-les-Lacs — the closest town — sits about ~700 m from here.
That “Excellent” label comes from a full season of official water sampling, not a single test — it's one step on a four-point scale (Excellent, Good, Sufficient, Poor) reassessed once a year. Today's actual conditions can differ from the seasonal average, so for a live snapshot see the “Right now” and 7-day outlook panels above. It's been a consistently reliable spot too — the rating has held at Excellent for 11 straight years. There are 12 places to eat within a kilometre — La Chaumière du Lac is the closest, about ~210 m away.
Frequently asked questions
Is Grand Lac de Clairvaux a safe beach for swimming?
It's about as safe as bathing water gets: Grand Lac de Clairvaux's 2025 EU rating is Excellent, the top tier on the scale, and 11 of 11 classified seasons have come back Excellent or Good. It's also held steady at Excellent for 11 straight years.
How cold or warm is the water at Grand Lac de Clairvaux today?
That's placeholder data, not a live measurement: Grand Lac de Clairvaux's marine-weather feed couldn't be reached, so the panel above is showing an estimated ~22°C until the real feed comes back. That's the reading right off Jura.
What's the ideal time of year to swim at Grand Lac de Clairvaux?
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 Jura.
What does the water quality rating actually measure?
The annual classification — Excellent, Good, Sufficient or Poor — is built from a full season of official testing for intestinal enterococci and E. coli, reported to the European Environment Agency each spring. Some national authorities (Croatia's IZOR among them) also publish individual samples during the season itself; Grand Lac de Clairvaux isn't yet covered by that in-season feed.
Can you drive to Grand Lac de Clairvaux?
By car, it's easy — parking is right by the beach. By bus, the nearest stop is Clairvaux-Mairie, about ~850 m away. The nearest town is Clairvaux-les-Lacs, about ~700 m away.