Skip to main content
LakeQuality
Excellent: 44Good: 1Poor: 1Not classified: 3

Lake map

Map shows 68 lakes with coordinates

Loading map…

Best-rated lakes to swim in Portugal

Officially classified Excellent for the 2025 bathing season, ranked by how often that class has held. Full best-lakes list →

  1. Albufeira da Tapada GrandeExcellent · Excellent 11/11 seasons
  2. Albufeira de QueimadelaExcellent · Excellent 11/11 seasons
  3. Albufeira do ErmalExcellent · Excellent 11/11 seasons
  4. Aldeia do MatoExcellent · Excellent 11/11 seasons
  5. AlqueirãoExcellent · Excellent 11/11 seasons
  6. CabrilExcellent · Excellent 11/11 seasons
  7. Castanheira Ou Lago AzulExcellent · Excellent 11/11 seasons
  8. FernandairesExcellent · Excellent 11/11 seasons
  9. Fraga da PegadaExcellent · Excellent 11/11 seasons
  10. LombaExcellent · Excellent 11/11 seasons
  11. MontesExcellent · Excellent 11/11 seasons
  12. RibeiraExcellent · Excellent 11/11 seasons
  13. Santa LuziaExcellent · Excellent 11/11 seasons
  14. Senhora da RibeiraExcellent · Excellent 11/11 seasons
  15. Vale do RossimExcellent · Excellent 11/11 seasons

Every rated bathing water in Portugal

Places in Portugal

Named lakes

LakePlaceTotal phosphorusChlorophyll-aSecchiYear
Albufeira Aguieira14 µg/L2023
Albufeira Alto Lindoso9.0 µg/L2023
Albufeira Caldeirao11 µg/L2023
Albufeira Castelo Bode5.9 µg/L2023
Albufeira Divor150 µg/L2023
Albufeira Fratel130 µg/L2023
Albufeira Fronhas10 µg/L2023
Albufeira Funcho Int C28 µg/L2018
Albufeira Maranhao62 µg/L2023
Albufeira Miranda40 µg/L2023
Albufeira Paradela6.0 µg/L2023
Albufeira Pisao20 µg/L2023
Albufeira Pocinho40 µg/L2023
Albufeira Pracana13 µg/L2023
Albufeira Roxo C48 µg/L2021
Albufeira Salamonde6.0 µg/L2023
Albufeira Santa Clara C32 µg/L2018
Albufeira Vale Gaio77 µg/L2022
Albufeira Vilarinho Das Furnas5.0 µg/L2023

Get Portugal water-quality updates

New official ratings and water-quality readings for lakes in Portugal. Unsubscribe anytime.

Frequently asked questions

Which lakes in Portugal are best to swim in?
44 of 49 designated bathing waters in Portugal are rated Excellent for 2025 under the EU Bathing Water Directive. That class measures E. coli and intestinal enterococci only — it is not a safety clearance.
Is it safe to swim in Portugal lakes?
The official class is a bacteriological rating, not a safety clearance. It does not cover algal blooms, nutrients, water clarity, currents, or depth. Conditions change after heavy rain. Check local signage and the operator's current notices before entering the water.
How is lake water quality measured in Portugal?
19 named lakes in Portugal have official phosphorus from the Portuguese Environment Agency (APA), via UNEP GEMS/Water, 2018–2023. These are the authority's own measurements, shown as reported.
Whose ratings do the Portugal lake pages show?
The publishing authority's own. Pages for lakes in Portugal show the values and classes that authority reports, with the season or year each was taken.

Where to stay near Portugal

Lakeside cabins, hotels, and vacation rentals near Portugal — live availability from Booking.com, Vrbo and Expedia.

Top-rated places to stay near Portugal

Prices for Sep 25–27, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a trip to Portugal?

Get lake water-quality updates plus the best cabin & lodging deals near Portugal — straight to your inbox. No spam, unsubscribe anytime.

Source: European Environment Agency (EEA), Bathing Water Directive. CC-BY 4.0.

UNEP GEMS/Water Global Freshwater Quality Archive v3 (OPEN / CC BY 4.0). Surface total phosphorus, chlorophyll-a, and Secchi from 2016 onward. Published as the authority reports it.

Monitoring: the Portuguese Environment Agency (APA), via UNEP GEMS/Water.