Switzerland · lake bathing waters
Lake swimming in Switzerland: 2025 water quality
Switzerland reported 135 lake bathing waters for the 2025 season. 86.7% were classified Excellent — 2.3 points above the 84.4% for all 160 bathing waters in the country — and 4 were Poor. 55 sites have been Excellent in every season from 2015 to 2025. Among the 19 countries with at least 30 lake bathing waters, Switzerland ranks 9 by Excellent share.
135
lake bathing waters
86.7%
Excellent in 2025
4
Poor in 2025
Annual, not live: the 2025 class summarises several seasons of sampling. It does not show today’s pollution, algae or bans.
Find the nearest Excellent lake to you →
Map of lake bathing waters
Excellent 117Good 8Sufficient 1Poor 4Not classified 5
How lake bathing waters in Switzerland rated since 2015
Counts for the sites in today’s 2025 inventory; the Excellent share is calculated over classified sites only.
| Season | Classified | Excellent | Excellent share | Poor |
|---|---|---|---|---|
| 2025 | 130 | 117 | 90% | 4 |
| 2024 | 129 | 118 | 91.5% | 0 |
| 2023 | 127 | 117 | 92.1% | 0 |
| 2022 | 127 | 117 | 92.1% | 1 |
| 2021 | 125 | 118 | 94.4% | 0 |
| 2020 | 112 | 103 | 92% | 1 |
| 2019 | 118 | 112 | 94.9% | 2 |
| 2018 | 104 | 100 | 96.2% | 1 |
| 2017 | 78 | 77 | 98.7% | 0 |
| 2016 | 97 | 94 | 96.9% | 0 |
| 2015 | 83 | 82 | 98.8% | 0 |
Most consistent Excellent lakes
55 sites were Excellent in all eleven seasons. Ordered by the length of the unbroken Excellent run ending in 2025; the first 60 are shown.
- ALBERGO ASCOLAGO 11 seasons
- ALBERGO CASTELLO DEL SOLE 11 seasons
- ALBERGO EDEN ROC 11 seasons
- ALBERGO ELVEZIA AL LAGO 11 seasons
- ALBERGO LA ROCCA 11 seasons
- ALBERGO TRESA BAY 11 seasons
- ALBERGO VIRALAGO 11 seasons
- ALBERGO ZAPPA 11 seasons
- BAGNO PUBBLICO AGNO 11 seasons
- BAGNO PUBBLICO ASCONA 11 seasons
- BAGNO PUBBLICO CAVIANO 11 seasons
- BAGNO PUBBLICO LOCARNO 11 seasons
- BAGNO PUBBLICO MAGADINO 11 seasons
- BAGNO PUBBLICO RIALE DI GERRA 11 seasons
- BAGNO PUBBLICO RIVA CACCIA 11 seasons
- BAGNO PUBBLICO SAN NAZZARO 11 seasons
- BAGNO PUBBLICO SCIMIANA 11 seasons
- BAGNO PUBBLICO VIRA GAMBAROGNO 11 seasons
- BAGNO SPIAGGIA CASLANO 11 seasons
- BAGNO SPIAGGIA CRODOLO 11 seasons
- CAMPEGGIO DELTA 11 seasons
- CAMPEGGIO LA PALMA 11 seasons
- CAMPEGGIO MOLINAZZO 11 seasons
- CAMPEGGIO MONTE GENEROSO 11 seasons
- CAMPEGGIO PARADISO 11 seasons
- CAMPEGGIO TOURING CLUB 11 seasons
- CAMPING UNTERÄGERI 11 seasons
- CASA VIGNASCIA 11 seasons
- FOCE MAGLIASINA 11 seasons
- HOTEL RISTORANTE ARBOSTORA 11 seasons
- LIDO BAGNO SPIAGGIA LUGANO 11 seasons
- LIDO CÀSORO 11 seasons
- LIDO COMUNALE AGNO 11 seasons
- LIDO COMUNALE BISSONE 11 seasons
- LIDO COMUNALE BRISSAGO 11 seasons
- LIDO COMUNALE CONCA D'ORO 11 seasons
- LIDO COMUNALE LOCARNO 11 seasons
- LIDO COMUNALE MAROGGIA 11 seasons
- LIDO COMUNALE MELANO 11 seasons
- LIDO COMUNALE MELIDE 11 seasons
- LIDO COMUNALE RIVA S. VITALE 11 seasons
- LIDO PATRIZIALE ASCONA 11 seasons
- LIDO RISTORANTE AL PORTO 11 seasons
- RISTORANTE LIDO CAPOLAGO 11 seasons
- SEEBAD LATTENBERG 11 seasons
- SPIAGGIA DELLE CANTINE 11 seasons
- SPIAGGIA PUBBLICA RANZO 11 seasons
- STRANDBAD BAUMEN 11 seasons
- STRANDBAD BÜRGER 11 seasons
- STRANDBAD KÜSNACHT 11 seasons
- STRANDBAD MAUR 11 seasons
- STRANDBAD REITLIAU 11 seasons
- STRANDBAD SEELIKEN 11 seasons
- STRANDBAD USTER 11 seasons
- SWISS DIAMOND HOTEL 11 seasons
- BADEPLATZ MISSISSIPPI (UFER 1) 10 seasons
- BADESTRAND LAGO MIO 10 seasons
- LIDO BRUNNEN, SZ/02 10 seasons
- SCHWIMMBAD ARBON 10 seasons
- SCHWIMMBAD ROMANSHORN 10 seasons
Lakes rated Poor in 2025
- PLAGE DE LA GRAVIERE Poor in 1 of 1 classified seasons
- PLAGE DE LA POINTE-À-LA-BISE Poor in 5 of 8 classified seasons
- PLAGE DU CREUX-DE-GENTHOD Poor in 1 of 7 classified seasons
- PLAGE DU VENGERON - AVAL Poor in 1 of 7 classified seasons
Changes from 2024 to 2025
Improved (2)
- PLAGE DE CHAMBÉSY Good → Excellent
- PLAGE GITANA Sufficient → Good
Declined (5)
- PLAGE DE GUMEFENS Excellent → Sufficient
- PLAGE DE L'ONU Excellent → Good
- PLAGE DE LA POINTE-À-LA-BISE Sufficient → Poor
- PLAGE DU CREUX-DE-GENTHOD Sufficient → Poor
- PLAGE DU VENGERON - AVAL Sufficient → Poor
Lake bathing waters by canton
Cantons with at least three lake bathing waters; counts include only this water type.
Near which major cities?
Sites within 60 km (straight line) of a major city covered by our city guides:
- Geneva 29 lake bathing waters within 60 km
- Zurich 25 lake bathing waters within 60 km
- Milan 17 lake bathing waters within 60 km
Lakes compared across Europe
| # | Country | Sites | Excellent | Poor |
|---|---|---|---|---|
| 1 | Austria | 254 | 96.9% | 1 |
| 2 | Finland | 211 | 95.7% | 0 |
| 3 | Denmark | 123 | 94.3% | 0 |
| 4 | Germany | 1,893 | 91.8% | 3 |
| 5 | Lithuania | 80 | 91.3% | 0 |
| 6 | Czechia | 62 | 90.3% | 0 |
| 7 | Portugal | 49 | 89.8% | 1 |
| 8 | Italy | 673 | 88.4% | 5 |
| 9 | Switzerland | 135 | 86.7% | 4 |
| 10 | France | 845 | 86.7% | 15 |
| 11 | Sweden | 210 | 82.4% | 6 |
| 12 | Estonia | 30 | 80% | 0 |
| 13 | Spain | 109 | 79.8% | 4 |
| 14 | Belgium | 77 | 79.2% | 1 |
| 15 | Netherlands | 587 | 70.5% | 26 |
| 16 | Slovakia | 40 | 70% | 0 |
| 17 | Hungary | 247 | 69.6% | 3 |
| 18 | Croatia | 34 | 67.6% | 0 |
| 19 | Poland | 489 | 60.1% | 5 |
Countries with at least 30 lake bathing waters. Networks differ in size and in how sites are designated, so this is a descriptive comparison, not a safety ranking.
Quick answers
- How many lake bathing waters in Switzerland are rated Excellent?
- 117 of 135 (86.7%) in the 2025 EEA classification.
- Which lakes in Switzerland have the best long-term record?
- 55 sites were Excellent in every season from 2015 to 2025, for example ALBERGO ASCOLAGO, ALBERGO CASTELLO DEL SOLE, ALBERGO EDEN ROC. See the full list.
- Can I check current conditions?
- The annual class is not a live status. Current results and bans are published on Badegewässer (BAFU, links to cantons). Each site page on BathingWaterFinder also shows a weather forecast, including heavy-rain warnings.
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