Alqueva Reservoir vs Lagoa das Sete Cidades

Alqueva Reservoir is the warmer swim right now at about 25.9°C. They are roughly 1599 km apart in Portugal.

Alqueva Reservoir

Alentejo

25.9°C

hot · modelled estimate

September average
25.9°C
Warmest month
August · 27.0°C
Coldest month
10.0°C
Swim season
May–November

Western Europe's biggest artificial lake, warm across the Alentejo summer.

Lagoa das Sete Cidades

Azores

19.5°C

mild · modelled estimate

September average
19.5°C
Warmest month
August · 20.0°C
Coldest month
13.0°C
Swim season
June–October

Lagoa das Sete Cidades in Azores, Portugal is swimmable in high summer, brisk either side of it, and stays mild even in winter.

Month by month

LakeJanFebMarAprMayJunJulAugSepOctNovDec
Alqueva Reservoir11.1°C10.0°C11.1°C14.3°C18.5°C22.8°C25.9°C27.0°C25.9°C22.8°C18.5°C14.3°C
Lagoa das Sete Cidades13.5°C13.0°C13.5°C14.8°C16.5°C18.3°C19.5°C20.0°C19.5°C18.3°C16.5°C14.8°C

Monthly values are modelled from each lake's long-term winter and summer envelope, then refined with today's forecast air temperature for the headline reading.

Related lake comparisons

Want a different mix? Compare up to four lakes side by side or browse all lake water temperatures.

Jump straight to a country, coastal region, city, seasonal ranking or comparison.