Swimming in the Seine: what it means for an event on a boat

Since designated swimming sites opened on the Seine, one question keeps coming up among organisers: will we pass swimmers during our evening on the boat, and could that disrupt the route? The articles we have already published on navigation rules and on flooding cover river traffic in general. This one takes a complementary angle: swimming itself, what you will see from the deck, and what remains possible or not.

Our aim is to give you practical points of reference. The sites, their hours and whether they open depend on decisions by the authorities and on water quality, which change from one season to the next. We therefore invite you to check the City of Paris's official information before finalising your programme.

Where the swimming sites are in Paris

The designated swimming areas are in three places in the capital: the bras Marie, near the Île Saint-Louis, in the historic centre; the Bercy area, in the 12th arrondissement; and the Grenelle area, in the 15th, facing the Île aux Cygnes. These are marked-off, supervised zones, with opening hours and facilities on land.

These locations are not insignificant for an organiser. They overlap with areas our boats use: central Paris for classic cruises, and Bercy and Grenelle for several boarding points. Knowing where they are lets you anticipate what your guests will glimpse from the deck.

How swimming coexists with navigation

Coexistence rests on a simple principle: the swimming zone is delimited and reserved for swimmers. Boats do not enter it. It is separated from the navigation channel by buoys and markers, and swimmers stay within the designated area, under the watch of lifeguards.

In practice, a privately chartered boat continues to sail along the usual channel, following the rules of navigation on the Seine, including reduced speeds in the city centre. The captain adapts their handling near signposted zones. For the organiser, this generally does not mean a change of programme, but rather a moderate pace when passing, which is ideal for enjoying the scenery anyway.

For details of the regulatory framework, you can read our article on navigation rules and timetables.

What your guests will see from the boat

During a daytime cruise, in the opening period, your guests will probably see lively areas: swimmers, lifeguards, and sometimes families on the landscaped banks. It is a new scene for a place long associated with navigation alone, and it often prompts a reaction from international guests and Parisians alike.

A few points to keep in mind:

• Swimming is limited to certain times of day: in the evening, the zones are in principle empty, but still marked out.
• Opening may be suspended on some days depending on water quality or river conditions. A closed site has no effect on your navigation.
• A late-afternoon or night-time cruise is hardly affected by the presence of swimmers.

If you are organising an event in the warmer months, it is a small narrative asset: you can mention the transformation of the Seine in your speeches.

What remains impossible from a privately chartered boat

We need to be clear on one point, as the idea of diving off the deck sometimes comes up at summer parties: swimming from a reception boat is not allowed. The official zones are reserved for supervised use, accessible from land. Jumping into the water from the boat remains prohibited for safety reasons: currents, river traffic and the absence of supervision.

This rule also applies to festive events and hen and stag parties, where the urge to dive in can arise after a few drinks. The onboard crew make sure these limits are respected. We recommend telling your guests from the outset, along with the rest of the safety instructions.

If you wish to combine swimming and an event, the answer is to separate them: a supervised activity at an official site, followed by boarding for the reception.

Adapting your event: boarding points and timing

The presence of these sites mainly influences two decisions: the choice of quay and the time of year.

As for the quay, the surroundings of the swimming sites can be busier on summer days: allow a little more time for access, guest arrivals and welcome. Our articles on boarding near the Île Saint-Louis, at Bercy and at quai de Grenelle detail the access and setting of each area.

As for timing, swimming is a warm-season activity. Evening events, dinners and early-evening cocktails are barely exposed to it. Lunches and family outings in midsummer are those where you will see the most activity on the banks.

Finally, keep some flexibility: opening depends on water quality, just as the river level depends on the weather. Your service, however, does not depend on the sites being open: the boat sails or stays at the quay according to the usual safety conditions, regardless of swimmers.