Mayor Zohran Kwame Mamdani and NYC Parks Commissioner Tricia Shimamura joined local families at Thomas Jefferson Pool in East Harlem on the opening day of the 2026 outdoor pool season, jumping in to mark the start of summer access at one of New York City’s best-known swimming facilities.
The opening comes as the city expects more than a million New Yorkers to use its pools this summer. Mamdani said he was proud to be among them and called opening day fanfare a reflection of how deeply the pools matter, not just as a place to cool off but as a place to learn a skill that can last a lifetime.
This year’s season carries extra weight because it also marks 90 years since the City opened 11 Olympic-sized outdoor public pools built through the Works Progress Administration. Only those 11 remain in the city’s outdoor pool system today, and they still anchor summer recreation across the five boroughs. Their age is part of the story, but so is how the city is using them now.
NYC Parks is expanding adult lap swim from five pools to 10 this summer, with sessions set for Monday through Friday from 7 to 8:30 a.m. The list reaches from Claremont and Van Cortlandt in the Bronx to Kosciuszko and McCarren in Brooklyn, Gottesman and Hamilton Fish in Manhattan, Astoria and Liberty in Queens, and Faber and Lyons on Staten Island. Senior Splash is also back at five outdoor pools, one in each borough, and will run three days a week at Astoria, Lyons, Sunset Park, Thomas Jefferson and Van Cortlandt.
That expansion sits beside another push already underway. Earlier this month, NYC Parks widened its free summer Learn to Swim classes from 10 to 18 outdoor pools, creating more than 16,000 class slots for children ages 18 months to 17 years. Shimamura said the pools are where children first learn to swim and where New Yorkers can beat the heat, stay fit and connect with each other, all for free.
The contrast is plain enough: these pools are beloved public spaces, but they are also being asked to do more. They must serve families on hot afternoons, adults looking for lap time, seniors looking for low-cost exercise and children who need water safety skills. That is why this opening day is more than a seasonal ritual. It is the first test of whether the city can keep an old public system busy, free and broad enough for the demand it still draws.
For now, the answer seems to be yes. The city has opened the season, widened the programs and put the emphasis on access, which means the biggest question left is not whether New Yorkers will show up at the pools. It is how far the city can stretch those hours, lessons and lanes before summer runs out.
