France · Haute-Savoie
Chatel Lac de Vonnes
Haute-Savoie, 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 | 25.8 | 0.4 |
| Thu 3 | 26.3 | 0.4 |
| Fri 4 | 26.4 | 0.4 |
| Sat 5 | 26.1 | 0.4 |
| Sun 6 | 26.1 | 0.4 |
| Mon 7 | 26.4 | 0.4 |
| Tue 8 | 26.3 | 0.4 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Not classified2015
- 2016: Not classified2016
- 2017: Not classified2017
- 2018: Not classified2018
- 2019: Not classified2019
- 2020: Not classified2020
- 2021: Not classified2021
- 2022: Not classified2022
- 2023: Not classified2023
- 2024: Not classified2024
- 2025: Excellent2025
Excellent in the most recent season, and 1 of 1 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Not classified |
| 2016 | Not classified |
| 2017 | Not classified |
| 2018 | Not classified |
| 2019 | Not classified |
| 2020 | Not classified |
| 2021 | Not classified |
| 2022 | Not classified |
| 2023 | Not classified |
| 2024 | Not classified |
| 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
- Saint-Gingolph Municipale16 kmHaute-Savoie
- Les Gets Municipale17 kmHaute-Savoie
- Meillerie Locum18 kmHaute-Savoie
- Saint-Paul Municipale19 kmHaute-Savoie
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- Easy by car — there's parking close to the beach.
- Bus stop: Les Fioles, about ~70 m away.
Food, stays & town
- Nearest village: Châtel, about ~1.2 km away.
- 13 places to eat within 1 km Closest is Le Monchu, about ~40 m away.
- 17 places to stay mapped nearby Closest is Le Mille, about ~230 m away.
- 3 shops nearby, the closest about ~810 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
- Full-service days
Is the water clean at Chatel Lac de Vonnes?
Thinking of swimming at Chatel Lac de Vonnes? The short answer: its official EU Bathing Water rating for 2025 is Excellent — the highest official classification under the EU bathing-water 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. There's parking about ~150 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 1 classified seasons on record has come back Excellent or Good. On site you'll find Toilets, Restaurant, and Kids' area. The nearest town, Châtel, is about ~1.2 km away.
Worth remembering: “Excellent” 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 Haute-Savoie. There are 13 places to eat within a kilometre — Le Monchu is the closest, about ~40 m away.
Frequently asked questions
Should you swim at Chatel Lac de Vonnes?
Yes — Chatel Lac de Vonnes carries the top EU Bathing Water classification, Excellent, for 2025, and 1 of its 1 classified seasons have rated Excellent or Good.
What is the sea temperature at Chatel Lac de Vonnes today?
Treat the ~26°C above as illustrative only — Chatel Lac de Vonnes's live marine feed was down when this page was generated, and the figure will be replaced with a real reading automatically once it's back. That's the reading right off Haute-Savoie. On the modeled climatology here, August usually runs warmest.
When should you plan a swimming trip to Chatel Lac de Vonnes?
For the warmest water, aim for July–September — that's when the modeled sea temperature is typically at its best. That applies to the water around Haute-Savoie. 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 Chatel Lac de Vonnes.
Is there parking near Chatel Lac de Vonnes?
By car, it's easy — parking is right by the beach. By bus, the nearest stop is Les Fioles, about ~70 m away. The nearest town is Châtel, about ~1.2 km away.