Bathing water quality in Southwest Finland (Varsinais-Suomi), Finland
Southwest Finland (Varsinais-Suomi) has 18 official bathing waters in the EEA dataset for the 2025 season (12 lake and 6 coastal). 88.9% were classified Excellent — 4.4 points above the 84.5% across Finland — and 0 were Poor. 14 sites have been Excellent in every season from 2015 to 2025.
Uimaveden laatu: Varsinais-Suomi
Varsinais-Suomi: 18 virallisesta EU-uimarannasta 88,9 % oli vuonna 2025 ”erinomainen”; luokituksen ”huono” saaneita: 0.
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official bathing waters
Excellent in 2025
Poor in 2025
Map of official bathing waters in Southwest Finland (Varsinais-Suomi)
Sea, lakes and rivers in Southwest Finland (Varsinais-Suomi)
| Water type | Sites | Excellent | Good | Sufficient | Poor | Not classified |
|---|---|---|---|---|---|---|
| Coastal | 6 | 4 (66.7%) | 2 | 0 | 0 | 0 |
| Lake | 12 | 12 (100%) | 0 | 0 | 0 | 0 |
Coastal waters are assessed against stricter bacterial limits than lakes and rivers but are diluted far more; see how the classes are calculated.
Most consistent Excellent sites
14 sites were Excellent in all eleven seasons. Ordered by the length of the unbroken Excellent run ending in 2025.
- EKVALLA 11 seasons
- HARJANVATSA 11 seasons
- HIEKKAHELMI 11 seasons
- HOVIRINTA 11 seasons
- KOKKILA 11 seasons
- LEHMIJARVI 11 seasons
- MARYNUMMI 11 seasons
- MELLILAN JARVI 11 seasons
- NAARJARVI 11 seasons
- NUMMIJARVI 11 seasons
- NUMMIJARVI 11 seasons
- NUNNALAHTI 11 seasons
- PIILJARVI 11 seasons
- SALKOLANJARVI 11 seasons
- ISONKIVEN UIMARANTA 5 seasons
- OINILA 1 season
Rated Poor in 2025
None of the 18 official bathing waters in Southwest Finland (Varsinais-Suomi) was classified Poor in 2025.
How Southwest Finland (Varsinais-Suomi) 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 | 18 | 16 | 88.9% | 0 |
| 2024 | 17 | 15 | 88.2% | 0 |
| 2023 | 18 | 17 | 94.4% | 0 |
| 2022 | 18 | 17 | 94.4% | 0 |
| 2021 | 18 | 17 | 94.4% | 0 |
| 2020 | 17 | 17 | 100% | 0 |
| 2019 | 17 | 17 | 100% | 0 |
| 2018 | 17 | 17 | 100% | 0 |
| 2017 | 17 | 17 | 100% | 0 |
| 2016 | 17 | 17 | 100% | 0 |
| 2015 | 17 | 17 | 100% | 0 |
All 18 official bathing waters in Southwest Finland (Varsinais-Suomi)
Grouped by water type, alphabetical within each group. Open a site for its 2015–2025 history, nearby alternatives, weather forecast and the national profile link.
Download all 18 sites as CSV (classes 2015–2025, coordinates, nearest place; EEA data, CC BY 4.0)
Coastal 6 sites · 66.7% Excellent
- EKVALLA · Haarla Excellent Excellent 11 seasons in a row
- HOVIRINTA · Kaarina Excellent Excellent 11 seasons in a row
- ISPOINEN · Uittamo Good
- KOKKILA Excellent Excellent 11 seasons in a row
- NUNNALAHTI · Naantali Excellent Excellent 11 seasons in a row
- SAARONNIEMI · Pansio Good
Lake 12 sites · 100% Excellent
- HARJANVATSA · Kiikala Excellent Excellent 11 seasons in a row
- HIEKKAHELMI · Paimio Excellent Excellent 11 seasons in a row
- ISONKIVEN UIMARANTA · Masku Excellent Excellent 5 seasons in a row
- LEHMIJARVI Excellent Excellent 11 seasons in a row
- MARYNUMMI · Halikko Excellent Excellent 11 seasons in a row
- MELLILAN JARVI · Mellilä Excellent Excellent 11 seasons in a row
- NAARJARVI Excellent Excellent 11 seasons in a row
- NUMMIJARVI Excellent Excellent 11 seasons in a row
- NUMMIJARVI Excellent Excellent 11 seasons in a row
- OINILA · Paimio Excellent
- PIILJARVI · Muurla Excellent Excellent 11 seasons in a row
- SALKOLANJARVI · Kärkölä Excellent Excellent 11 seasons in a row
Compared with other regions in Finland
| # | Region | Sites | Excellent | Poor |
|---|---|---|---|---|
| 1 | Pohjois-Karjala | 23 | 100% | 0 |
| 2 | Keski-Suomi | 19 | 100% | 0 |
| 3 | Pirkanmaa | 35 | 94.3% | 0 |
| 4 | Pohjois-Pohjanmaa | 19 | 89.5% | 0 |
| 5 | Southwest Finland (Varsinais-Suomi) | 18 | 88.9% | 0 |
| 6 | Helsinki-Uusimaa | 70 | 75.7% | 1 |
| 7 | Pohjanmaa | 18 | 44.4% | 1 |
Regions with at least 15 official bathing waters. Size, water type and how densely sites are designated differ, so the table is context rather than a verdict.
Quick answers
- How many bathing waters in Southwest Finland (Varsinais-Suomi) were rated Excellent in 2025?
- 16 of 18 (88.9%) in the official EEA 2025 classification; 2 were Good, 0 Sufficient and 0 Poor. That ranks Southwest Finland (Varsinais-Suomi) 5 of 7 Finland regions by Excellent share.
- Which beaches and lakes in Southwest Finland (Varsinais-Suomi) have the best long-term record?
- 14 sites were Excellent in every season from 2015 to 2025, for example EKVALLA, HARJANVATSA, HIEKKAHELMI. See the ranking.
- Were any bathing waters in Southwest Finland (Varsinais-Suomi) rated Poor?
- No. None was classified Poor in 2025.
- Where do I check whether swimming is allowed today?
- On Uimavesi (LVV) (Permit and Supervision Agency (LVV) and municipal health-protection authorities). Temporary bans, pollution alerts and closures are published there and on signs at the water, not in the annual EEA class.
Finland overview · All regions of Finland · Bathing season dates
Sources and method
Bathing-water records: European Environment Agency (EEA), data and coordinates reported by Finland, licensed CC BY 4.0. Region and area boundaries: Eurostat NUTS 2024 (© EuroGeographics for the administrative boundaries). Place names: GeoNames (CC BY 4.0). A site belongs to the area that contains its reported coordinates; a site up to 10 km off the generalised coastline is placed in the nearest area of Finland. Counts, shares and rankings are calculated by BathingWaterFinder from the official records.