If you’ve had enough of winter, there’s no need to book a flight south to enjoy your favorite summertime activities. Here are indoor venues where you can golf on your favorite (virtual) fairway, do Pilates in the pool at a seaside Hamptons resort, play beach volleyball in the sand or fill your lungs with salt air.

Beach volleyball

WHEN | WHERE 6 p.m.-midnight every Friday, Endless Summer Volleyball, 3580 Oceanside Rd., Oceanside

INFO 516-764-1555, endlesssummervb.com

ADMISSION $15

Kick off your snow boots and change into cutoffs for a game of beach volleyball like it’s played in the summertime: barefoot in the sand.

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Endless Summer Volleyball’s indoor heated courts are covered with a foot of sand, so many players act like it’s July and play barefoot, says club owner Robert Phillips. During volleys, reggae and dance music pump out of the sound system.

Phillips says, “It’s as close to beach volleyball as you can get.”

Order pizza, pretzels, quesadillas, a beer or cocktail at the courtside patio bordered by miniature palm trees.

A new spring league starts Feb. 21. You can sign up a team or register as a free agent and be assigned to a team, Phillips says. The second annual volleyball tournament will be held on Feb. 25.

Floating Pilates and yoga classes

WHEN | WHERE Daily by appointment, Gurney’s Montauk Resort, 290 Old Montauk Hwy.

INFO 631-668-1892, gurneysmontauk.com

COST $45

If you enjoy stand-up paddleboard exercises on the bay, Gurney’s offers the next best thing: Pilates and yoga classes on floating mats anchored in the pool at the resort’s seawater spa. The pool is filled with filtered seawater from the Atlantic Ocean, the same body of water visible outside the spa windows as you exercise. Classes are led Gina Bradley, owner of Paddle Diva in East Hampton.

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Sit in a salt cave

Inside The Healing Grotto’s salt cave in Bellmore, temperatures hover in the low to mid-70s and spa music plays as you lounge in an extra-wide zero-gravity beach chair. The 16-foot-by-24-foot artificial cave, which is packed with 13,000 pounds of pink Himalayan salt on the floor and walls, also features a 9-foot screen with projected sunsets from around the world. “You feel like you are really on the beach,” says owner Steve Izen. Sessions last 45 minutes and cost $45. (516-221-7258, healinggrotto.com)

There are other salt caves in Bayport, Huntington, Montauk and Port Jefferson.

Simplay multisport simulators

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WHEN | WHERE 9 a.m.-9 p.m. Sunday-Thursday, until 10 p.m. Friday-Saturday, Simplay, 180 Commerce Dr., Hauppauge

INFO 631-617-6363, simplayny.com

ADMISSION $45/hour weekdays until 5 ($55/hour nights and weekends)

At Simplay, an indoor virtual multisports arena that opened last year in the Hauppauge Industrial Park, simulators virtually transport you to the great PGA golf courses of the world.

“We have a driving range mode and 87 golf courses to choose from, including the Bethpage Black, Pebble Beach in California, and St. Andrews in Scotland,” says general manager Josh Sisler. Bring your clubs along and hit into a 16-foot screen, which provides video and feedback on your game.

You can also play simulated versions of soccer, baseball, dodgeball and six other sports.