Looking for the best adult Halloween events in San Antonio in 2025? From haunted houses and ghost tours to pub crawls and after-dark parties, the Alamo City is full of spooky fun for grown-ups this October. 

Here’s your ultimate guide to the best Halloween events in San Antonio for adults.

Fright Fest at Six Flags Fiesta Texas

Select Nights, September 6 – November 2, 2025

For pure adrenaline, head to Six Flags Fiesta Texas during Fright Fest. Haunted mazes like Hexenhaus, Nosferatu, and the all-new SAW: Legacy of Terror bring nightmares to life, while scare zones like Carnival of Terrors and Hell Valley Cemetery ensure no path is safe.

Catch live Halloween shows such as Monster Mash Bash or the eerie Crossroads, then ride coasters like Dr. Diabolical’s Cliffhanger under the cover of darkness.

With terrifying mazes, themed food and cocktails, and fireworks to cap the night, Fright Fest is a must for thrill-seekers.

Howl-O-Scream at SeaWorld San Antonio

Select Days September 12 – November 1, 2025

When the sun sets, SeaWorld San Antonio transforms into the largest Halloween event in Texas.

Howl-O-Scream features six haunted houses, eight immersive scare zones, and chilling live entertainment.

Fan-favorite haunts like Milton Creek Manor and Atlantis: The Cursed Chasm return, alongside scare zones crawling with vampires, zombies, and haunted dolls.

Adults can toast to the terror at Till Death Do Us Party, a spooky reception complete with a live band and eerie cocktails.

Don’t miss Monster Stomp and Sirens Song, two sinister stage shows that deliver scares with a theatrical twist. All included with park admission!

Sinister Sips Masquerade Wine Dinner

October 30, 2025 | 21+ Only

Looking for an elegant spin on your Halloween festivities? Head to the St. Anthony Hotel for Sinister Sips Masquerade Wine Dinner.

For adults 21+, this event will feature a four-course meal by James Beard Award semi-finalist Chef Leo Davila, as well as wines from Orin Swift wines. 

The Rocky Horror Picture Show at San Pedro Playhouse

October 31, 2025 | 18+ Only

It’s just a jump to the left… and a scream to the right! On Halloween night, celebrate the 50th anniversary of The Rocky Horror Picture Show at San Pedro Playhouse.

This 18+ event features two screenings of the cult classic film, a costume contest, themed lobby activations, food trucks, and a full bar.

Audience participation is encouraged, so don’t forget your costumes, props, and best “Time Warp” moves.

Haunted Pub Crawls & Ghostly Tours

Sisters Grimm Ghost Bus: Haunted Pub Crawl

Select weekends through November 1, 2025 | 21+

Hop aboard the Sisters Grimm Ghost Bus for a 2.5-hour 21+ haunted pub crawl through San Antonio’s eeriest bars.

With ghost stories, haunted history, and chilling stops, this experience is equal parts spooky and spirited.

Sisters Grimm | Grimm Manor: Halloween Tea Party & Cemetery Tour

October 17-28, 2025

Take your spooky season to the next level with a haunted high tea experience hosted by Sisters Grimm Ghost Tours. The evening begins at the Oddities Parlor downtown, followed by a spirited ride to Grimm Manor, a beautifully eerie estate beside one of San Antonio’s oldest cemeteries.

Then, you'll be treated to hauntingly delicious creations by Grim Bakers, winners of Food Network’s Halloween Baking Championship, and then guided on a candlelit cemetery tour full of ghost stories and historic intrigue.

Costumes are encouraged, and there’s even a prize for best dressed!

Bad Wolf Ghost Tours’ Haunted Pub Crawl

Friday & Saturday Evenings | Reservations Required | 21+

As San Antonio’s first haunted pub crawl (and the oldest in Texas!), Bad Wolf Ghost Tours promises eerie stories, paranormal activity, and four of the city’s oldest haunted bars.

Enjoy drink specials, free cover, and plenty of spine-tingling history along Alamo Plaza and the River Walk.

Nightly Spirits’ Booze and Boos Tour®

Tours Offered Year-Round | 21+

Costumed guides lead the way on this Booze and Boos® walking tour, starting at Maverick Whiskey.

Over 2.5 hours, you’ll sip cocktails from haunted bars and hear chilling tales of murder, legends, and restless spirits around downtown San Antonio.

RJA Ghost Tours

For a classic haunted history walk, join the RJA Ghost Tour.

Nightly at 9:00 PM, guides lead guests through San Antonio’s most haunted streets and sites, departing from the historic Crockett Tavern. Reservations required.

Adult Nite: Halloween at The DoSeum

October 30, 2025 | 21+ Only

San Antonio’s children’s museum gets a grown-up twist for Halloween Eve. At Adult Nite: Halloween at The DoSeum, enjoy trick-or-treating for adults, live music, food and drink vendors, and a costume contest. Haunt the halls, sip a spooky cocktail, and let your inner child run wild—no kids allowed.

Plan Your Spooky Getaway

This Halloween, San Antonio comes alive after dark with haunted houses, pub crawls, and ghostly fun tailored for adults.

Whether you want to scream your way through theme parks or raise a glass with the spirits of the city, you’ll find plenty of thrills in the Alamo City.