Complexo Desportivo do Clube Nacional de Natação (CNN)

I swam on a Sunday in July 2022. Not too crowded, helpful staff at front desk. Clean and not too chlorinated water. Bring a lock. Normal width locks worked fine but were a tight squeeze. Walk past tennis courts to find entrance from the street.

On a Wednesday evening, only one lane, denoted by a yellow pista livre sign, was open to lap swimmers. A swim team, private lessons, and aqua aerobics used the others. The blue line at the bottom of my lane was almost directly underneath my lane line, which I kept running into. The pool had eight, blue, T-line markers on the bottom, but nine lanes were set up, rendering the blue lines useless. Throughout a four-month period, I used many pools in 15 European countries, and this was by far my most expensive and most awkward swim. The lockers accommodate only very tiny locks. (My TSA suitcase lock worked well.) The lane lines could use a good cleaning; a layer of grey grime covered the exposed parts. On the positive, the staff was cheerful and helpful, and lots of kickboards and pull buoys were available. I was told there was a 90-minute to two-hour time limit, but it didn’t seem like it was enforced. The locker rooms are single gender, and a shower automatically sprays you on your way to the pool.

Pool hours for 2018-2019 are: Monday, Wednesday, and Friday from 7 AM to 4:45 PM and from 7 to 9:30PM; Tuesday and Thursday from 7 AM to 9:30PM; Saturday from 8:30 AM to 6:30 PM; and Sunday from 9 AM to 1:30 PM.

The pool is within walking distance of the city center. Good for training. The Masters team was swimming there when I arrived. It was not crowded, I got a lane of my own. Do remember to bring a swimcap and a lock.

A great find! (Don't tell anyone!). I had my own lane with a few empty lanes around me on a weekday afternoon. Kick boards and pull-buoys are readily available. A swim cap is required and bring your own padlock. The desk attendant spoke English and was very nice / helpful.

I love this place; it's a beautiful glass building quietly tucked behind a parking structure on busy São Bento

Excellent place to swim. Never crowded, clean, and easily accesible. Worth the €10 per visit.

The pool was a pleasure to swim in! It was clean and very light and airy. I went at a few different times and it was never very crowded. The two walls of windows make it extra lovely to swim there.