Roaches? Want them gone now?

Why pests thrive in San Antonio

NOAA's official 1991–2020 climate normals for San Antonio International Airport show about 32.38 inches of precipitation a year and an average annual temperature of 69.6°F. Winters are mild: the average winter (December–February) low is about 42.8°F, and the average summer high is about 94.4°F. That is far drier than Houston or the Gulf Coast, which changes the pest mix: San Antonio gets fewer moisture-loving pests and more scorpions, fire ants after rain, and roaches that can live away from water.

Even in a drier city, water still decides where pests show up. UF/IFAS calls water the most important factor in cockroach survival, and in San Antonio roaches and rodents gather around leaking irrigation, AC condensate lines, pet bowls and drains. Heavy storms push fire ants to build new mounds and drive scorpions out of woodpiles, and hot, dry spells send pests indoors looking for moisture.

Because the cold months are short and mild, many pests in San Antonio slow down in winter instead of dying off the way they do farther north. That makes pest control here a year-round job, not just a summer one.

Sources: NOAA NCEI: U.S. Climate Normals 1991–2020 · UF/IFAS: Cockroaches and Their Management

Sources: NWS Austin/San Antonio: San Antonio monthly normals

Roach types you'll see in San Antonio

Not every roach means the same thing. Telling them apart helps you know whether you are dealing with a stray from outside or a problem breeding in your kitchen.

American cockroach (palmetto bug)

A large, reddish-brown roach. UF/IFAS shows the adult at about 1½ inches long. Along with other large species it is often called a palmetto bug. It prefers damp, warm places like sewers, garages, storerooms and crawl spaces, and comes indoors from those breeding sites.

German cockroach

A small roach. UF/IFAS says adults of the smaller species are seldom more than ⅝ inch long. German cockroaches live indoors, close to food and water, usually in kitchens and bathrooms. Small, light-brown roaches in a kitchen, especially during the day, are the ones most likely to be breeding inside your home, apartment or restaurant.

Brown-banded cockroach

Another small roach, about the size of a German cockroach, with two light bands across the wings. UF/IFAS lists it with the German and Asian roaches as the smallest common species. It needs less water than the German roach, so it shows up in bedrooms, living rooms, furniture and electronics, not just kitchens.

What this means for you

UF/IFAS notes that outdoor roaches do not survive well indoors, and often just removing the ones that get in is enough. Small roaches multiplying in your kitchen are a different problem. They usually need baits, crack-and-crevice treatment and follow-up visits. See our roach guide for photos, and our roach treatment guide for how pros choose and use products like bifenthrin.

Sources: UF/IFAS: Cockroaches and Their Management

📞 Call nowWant them gone now? Talk to a local pro today.

Free local help: the Texas A&M AgriLife Extension, Bexar County

Extension offices are a free, research-based source for identifying insects and learning how to manage them. The Texas A&M AgriLife Extension, Bexar County is at 1615 Sherman Street, San Antonio, TX 78202.

If you are not sure what bug you have, a clear photo or a sample in a sealed bag can help Extension staff or a licensed pro identify it. Identification comes first, because German roaches, palmetto bugs, Formosan termites and native termites are each handled differently.

Sources: Texas A&M AgriLife Extension: Bexar County

DIY or call a pro?

Where DIY can work

• A single large roach that got in from outside: remove it and seal the gap where it came in.
• Fixing leaks, emptying the drip pan under the fridge, and storing food in sealed containers. UF/IFAS lists these as key steps.
• Emptying containers that hold water every week to cut down on mosquitoes.
• Clearing clutter and sealing openings so rodents have fewer places to hide and get in.

When to call a licensed pro

• Small roaches in the kitchen or bathroom, or roaches you see in daylight.
• Any sign of bed bugs. The EPA says bed bugs are hard to eliminate, and many infestations need a professional.
• Termite swarmers or shed wings indoors, mud tubes on walls, slabs or piers, or soft and damaged wood.
• Rodent droppings, gnaw marks or noises in walls or the attic.
• Rentals, short-term rentals and restaurants, where one problem can affect tenants, guests or inspections.

The EPA recommends integrated pest management (IPM): inspect, identify the pest, prevent it, and use pesticides carefully as one part of a larger plan. Always follow the label. The label is the law for pesticide use.

Sources: UF/IFAS: Cockroaches and Their Management · EPA: Do-it-yourself bed bug control · EPA: Introduction to IPM

San Antonio prevention checklist

• Fix dripping faucets and leaking pipes under sinks.
• Empty and clean the refrigerator drip pan, and check AC condensate lines.
• Don't leave water standing in sinks overnight.
• Store food, pet food and birdseed in sealed containers.
• Take out kitchen trash every night. Keep outdoor bins closed and away from doors.
• Seal gaps around pipes, cables, doors and windows.
• Keep mulch and wet leaves a few inches back from the foundation.
• Stack firewood off the ground and away from the house.
• Trim tree branches and vines back from the roof so roaches and rats cannot climb in.
• Once a week, empty, scrub, turn over or throw out anything that holds water, like buckets, tires, plant saucers and toys.
• During Formosan swarm season, turn off unneeded outdoor lights in the evening and close the blinds.
• Check secondhand furniture and luggage for bed bugs before bringing them inside.

Sources: UF/IFAS: Cockroaches and Their Management · CDC: Mosquitoes · North American Termite Survey: swarm seasons · EPA: Bed bugs · CDC: Rodents

Airbnb & short-term rental hosts

Guests bring luggage, and the EPA notes that bed bugs travel in luggage, clothing and furniture. A short check during each turnover can catch problems early.

Turnover checklist

• Check mattress seams, box springs and headboards for live bugs, shed skins, or small rusty or dark spots.
• Wash and dry linens on high heat.
• Look under the sink and behind the fridge for roach droppings or egg cases.
• Leave no food out between guests.
• Empty trash and recycling before you leave.
• Check outdoor containers for standing water after it rains.

If a guest reports bugs

Ask for a photo, keep the unit empty if you can, and call a licensed pro to identify the pest before the next booking. Do not use foggers. The EPA cautions against relying on them for bed bugs.

Sources: EPA: Bed bugs · EPA: Do-it-yourself bed bug control

Termites: San Antonio's biggest risk to buildings

San Antonio's main termite threat is the native subterranean termite. The eastern subterranean termite is the most common termite in North America; colonies range from about 20,000 to 5 million workers. Native subterranean swarmers are dark, fly in daylight, and usually start swarming in February or March. The invasive Formosan termite is also found in Texas, where its swarm season is late May to early June, at night around lights.

Signs to look for

• Swarms at night around lights (Formosan), or daytime swarms in late winter and spring (native termites).
• Dead swarmers or shed wings on windowsills, in spider webs or inside porch light covers.
• Mud tubes on foundations, slabs, piers or walls.
• Wood that sounds hollow or crumbles.

See our termite guide for more.

Sources: North American Termite Survey: swarm seasons

San Antonio pest control FAQs

Are palmetto bugs the same as cockroaches?

Yes. UF/IFAS says the larger cockroaches, including the American and smokybrown, are often called palmetto bugs. They usually live outdoors and come inside when they wander in or are carried in.

Is one big roach a sign of an infestation?

Not always. UF/IFAS notes that outdoor cockroaches do not survive well indoors and that people often overreact to them. Small roaches in the kitchen or bathroom, seen in daylight or in numbers, are more likely to be German cockroaches breeding inside. That is the time to call a pro.

Are San Antonio scorpions dangerous?

Texas A&M says the striped bark scorpion's sting is painful and can cause swelling and itching for days, but no scorpion in Texas is considered lethal to people. Reactions vary, so anyone with a severe reaction should get medical care.

When do termites swarm in San Antonio?

In Texas, the North American Termite Survey lists Formosan swarm season as late May to early June. They swarm at night and are drawn to lights. Native subterranean termites usually swarm in daylight earlier in the spring.

Can I get rid of bed bugs myself?

The EPA says do-it-yourself control is possible in some cases, but bed bugs are hard to eliminate and the EPA recommends a pest management professional for many infestations. Do not use outdoor-only pesticides indoors.

How much does pest control cost in San Antonio?

Prices depend on the pest, the size of the property and the plan, so we do not publish numbers we cannot back up. UF/IFAS advises getting estimates from several reputable firms. Call and ask for a written quote.

Is pest control licensed in Texas?

Yes. Commercial pest control in Texas is regulated by the Texas Department of Agriculture, Structural Pest Control Service. Ask any company for its license number before work starts.

Who pays for pest control in a rental?

It depends on Texas law, the lease, and what caused the problem. See our landlord section and its source (Texas Property Code §92.052), and read your lease. This guide is not legal advice.

Where can I get free help identifying a bug in San Antonio?

The Texas A&M AgriLife Extension, Bexar County offers research-based help, and a licensed pro can identify pests during an inspection.

Sources: UF/IFAS: Cockroaches and Their Management · North American Termite Survey: swarm seasons · EPA: Do-it-yourself bed bug control · Texas Department of Agriculture: Structural Pest Control Service license lookup · Texas A&M AgriLife Extension: Bexar County