Halfway through. What about your summer checklist?

SWIM
The Floating Pool Lady
What: Bringing back a vintage NYC tradition: free public swimming in a pool-on-a-barge moored in the East River.
Why: Sink or swim. It’s only here until Labor Day.
When: It’s a mob scene on the weekends (don’t bother). Sources say the best time is 11 a.m.-1 p.m. weekdays.
Where: Brooklyn Bridge Park, 334 Furman St., at Joralemon St., B’klyn Heights. Free shuttle buses from the subway. Info at 718-222-9742 or online at brooklynbridgepark.org.

BUY
Summer Remnants
What: Up to 75 percent off Comme des Garçons, Marc Jacobs, Junya Watanabe, Alexander McQueen, Billionaire Boys Club, Society for Rational Dress, and much more.
Why: Summer dress beats winter, time and again.
When: Thurs. & Fri., 10 a.m.-7 p.m.; Sat., 10 a.m.-8 p.m.; Sun., 11 a.m.-5 p.m.
Where: Reed Space, 151 Orchard St., b/t Stanton & Rivington Sts. (212-253-0588). More info at 917-330-8352.

EAT
At the Red Hook Ball Fields
What: Latin food carts line soccer grounds. This is the authentic stuff, people. Come and get it before their permits expire.
Why: Make the concession (stand).
When: When you’re in the mood for cornmeal pancakes, ceviche, and roasted corn on the cob.
Where: Corner of Clinton & Bay Sts., Red Hook. Eat for yourself, then sign up to Save Soccer Tacos.

DO
P.S.1 + Water Taxi Beach Combo
What: Rally the troops for a late afternoon of art, music, and beer. Walk down the block for a full night of cheap eats and dancing on a makeshift beach.
Why: It’s the kind of jam-packed cultural happening that justifies your NYC rent.
When: Sats.-the end of summer. P.S.1, 3-9 p.m.; Water Taxi, 8 p.m.-3 a.m.
Where: Long Island City. Directions online at ps1.org or watertaxibeach.com.

SEE
An Outdoor Solar-Powered Arts Festival
What: Part two of the Solar One dance series — held in an eco theater.
Why: It’s modern, experimental, multidisciplinary, and allows you to lay on a blanket on the grass.
When: Thurs.-Sat., 6:30 p.m.
Where: Stuyvesant Cove, 23rd St. & the E. River. Info at 212-505-6050.