Arriving at the Butte aux Cailles swimming pool in swim shorts and without a swim cap means heading straight to the exit. This Art Deco pool in the 13th arrondissement of Paris attracts visitors for both its architecture and its heated outdoor pool, but the internal regulations leave no room for flexibility. Before packing your bag, it’s best to know exactly what is accepted and what is not.
Swimwear allowed at the Butte aux Cailles pool: what has changed
The point that surprises most visitors concerns the length of the clothing worn in the water. Since the recent updates to the regulations of Parisian municipal pools, the clothing must stop at the elbows and knees at most. Long swim t-shirts and clothing that covers beyond these limits are no longer accepted, unless there is a medical justification.
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In practice, one can wear a one-piece swimsuit, a two-piece swimsuit, or fitted swim shorts. Loose swim shorts, like Bermuda shorts, remain prohibited just like in all Parisian municipal pools. This is a hygiene rule: non-fitted fabrics retain more external residues.
To properly anticipate the rules to follow at the Butte aux Cailles pool, it is important to note that a swim cap is mandatory in all pools, both indoor and outdoor. Opinions vary on this point regarding tolerance in summer at the Nordic pool, but the official directive remains clear: no cap, no access to the water.
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Actual swimming hours: the 45-minute trap before closing
Most online listings show opening and closing hours, but they omit a detail that changes everything. The Butte aux Cailles pool implements a system of gradual cut-offs before the displayed closing time.
- Last swimmers admitted: 45 minutes before closing time. If the pool closes at 8 PM, you can no longer enter after 7:15 PM.
- Evacuation of the outdoor pool: 45 minutes before closing. You exit the water at the same time as the last entries are refused.
- Evacuation of the indoor pool: 30 minutes before closing. You gain an extra quarter of an hour in the water compared to the Nordic pool.
In practice, if you arrive at 7:20 PM for a closing time of 8 PM, you will be left on the sidewalk. Allowing at least an hour before closing ensures a stress-free swimming session.
Heated outdoor pool and indoor pool: specific rules for each area
The Butte aux Cailles pool offers several pools, and the rules are not the same everywhere. The Nordic pool, located outdoors, is the one that attracts the most curiosity. Its water is supplied by an artesian well, giving it a naturally warm temperature, distinct from the classic indoor pool.
Showering is mandatory before accessing each pool. This is not a recommendation: lifeguards check. The footbaths must also be crossed, not circumvented.
Children’s pool and supervision
The small pool is reserved for accompanied children. An adult in swimwear must be present in the water with the child. You cannot remain dressed on the edge while supervising from a distance. This rule applies to all Parisian municipal pools, but it is particularly enforced here due to the high attendance at the site.
Lockers, personal items, and behavior on the premises
The lockers operate without personal locks. You receive a token or a key at the cash register. Do not leave any valuables in the changing rooms: the City of Paris disclaims all responsibility in case of theft, and the changing rooms are communal, not individual closed cabins.
Regarding behavior, cameras and phones are prohibited in the pool and changing room areas. This is a measure to protect privacy, strictly enforced. Full-face snorkel masks are also not allowed; only standard swim goggles are permitted.
Crowds and public slots
Parisian pools share their schedule between the public, schools, and sports associations. At Butte aux Cailles, some daytime slots are reserved for schools and swimming clubs. Before heading out mid-morning or early afternoon on weekdays, check the updated schedule on the City of Paris website. Weekend slots remain the most accessible for the general public, but also the busiest.
Unexpected closures and SMS alerts
The Butte aux Cailles pool may close without notice for technical reasons (water treatment, heating failure, weather conditions for the outdoor pool). The City of Paris offers an SMS alert service: you can sign up online and receive a notification in case your pool closes.
For an establishment as old as Butte aux Cailles, this service prevents unnecessary trips, especially in winter when the Nordic pool may be closed independently of the indoor pool.
The Butte aux Cailles pool combines remarkable architectural surroundings with strict operational constraints. Mandatory cap, fitted clothing to the elbows and knees, arrival at least 45 minutes before closing: these three points are enough to avoid the majority of access refusals observed at the entrance.