For generations, the idea of taking a dip in the toxic River Seine would have earned you a puzzled look—or a warning not to even think about it. Today, however, one of the world’s most iconic rivers has become one of Paris’s coolest summer attractions.
After more than a century of being off-limits, the Seine has reopened to public swimming, transforming the river that winds past the Eiffel Tower, Notre-Dame Cathedral and the Louvre into an urban oasis for locals and visitors alike.
On warm summer days, designated swimming areas fill with Parisians eager to cool off, while curious tourists happily add “swimming in the Seine” to their Paris bucket lists. It’s a scene few people could have imagined just a decade ago.
A Century in the Making
Swimming in the Seine wasn’t always forbidden. In fact, it was a popular pastime during the late 19th and early 20th centuries. But as Paris grew and industrialization increased, the river became heavily polluted.
By 1923, authorities had officially banned swimming in the Seine because of poor water quality and public health concerns. Despite occasional promises by politicians over the decades, restoring the river seemed almost impossible.
Then came an ambitious vision.
In preparation for the 2024 Paris Olympic and Paralympic Games, France launched one of Europe’s most extensive urban river clean-up projects. More than €1.4 billion was invested in modernizing sewer systems, improving wastewater treatment facilities, constructing massive underground stormwater storage basins and reducing pollution that flowed into the river after heavy rains.
The payoff came when Olympic triathletes and marathon swimmers successfully competed in the Seine—an achievement that signaled the river was finally on its way back.
Paris’s New Summer Playground
Today, several supervised swimming sites allow visitors to safely enjoy the Seine during the warmer months. Lifeguards monitor swimmers, water quality is tested regularly, and the designated areas offer a refreshing escape from Paris’s summer heat.
Imagine floating in the water while gazing up at centuries-old architecture, watching sightseeing boats glide past and enjoying a completely different perspective of one of Europe’s most beautiful cities.
It’s hard to think of another major capital where you can swim in the heart of downtown with postcard-worthy landmarks all around you.
A Symbol of a Cleaner Future
The Seine’s remarkable turnaround is about more than swimming. It represents decades of environmental planning, engineering and political determination to reclaim one of France’s most treasured natural landmarks.
For visitors, it also offers a unique way to experience Paris beyond museums, cafés and shopping. Whether you choose to dive in or simply watch locals enjoying their newly revived river, the Seine has become a symbol of how cities can reinvent themselves.
So next time you’re packing for Paris, don’t forget something that probably wasn’t on your travel checklist before: a swimsuit. The Seine is finally open for business—and it’s making quite a splash.