The short version
Around San Antonio, mosquito season runs from about March into November. Start by dumping standing water every week. A barrier spray every few weeks adds steady relief.
- Dump standing water every week.
- Daytime biters are usually tiger mosquitoes.
- Barrier sprays last about three to four weeks.
- Larvicide handles water you can’t drain.
- Use repellent with DEET, picaridin or IR3535.
Homeowners and renters in San Antonio who want their yard back.
What to look for
Often the source is a neighbor's yard or a storm drain. Mosquitoes breed in standing water, even a bottle cap's worth. In summer heat, eggs become biting adults in about a week.
- 1A neighbor's pool turning green and untended.
- 2Clogged gutters holding water after rain.
- 3Dogs testing positive for heartworm.
- 4Mosquitoes indoors resting on walls or in closets.
- 5Rain barrels without screens or lids.
- 6Egg rafts floating on stagnant water.
Why it’s worth acting soon
- Each new generation is bigger than the last.
- Bites can spread West Nile virus.
- Itchy welts, especially for kids.
- Heartworm risk for dogs.
bite, to get protein for their eggsOnly female mosquitoesUS CDC in standing water, from a bottle cap to a pondMosquitoes breedUS EPA West Nile virus is the most common mosquito-borne disease in the U.S.Mosquito diseasesUS CDC Treatment options and typical costs
Property Inspection for Breeding Sites
$0–$150 (often bundled with a first treatment)
For San Antonio homes, a good inspection sets expectations too: a yard that backs onto a wetland won't respond like a dry cul-de-sac, and the pro should tell you that up front.
- Time
- 30–60 minutes
- Best for
- Every yard; finds where mosquitoes actually breed
Source Reduction and Larviciding
$75–$150 per visit
Because larvicide works on mosquitoes that can't fly away yet, it's the foundation of most plans in San Antonio. Adult spraying is the follow-up, not the fix.
- Time
- 45–90 minutes
- Best for
- Yards with standing water, clogged gutters, ponds, or drains
Barrier (Residual) Yard Treatment
$75–$200 per visit; $350–$900 per season
Barrier spray is the workhorse of mosquito control in San Antonio, but it is only as good as the coverage of vegetation. Open lawns hold few adults; hedges and ivy hold thousands.
- Time
- 20–45 minutes per visit, repeated every 3–4 weeks
- Best for
- Shaded yards with shrubs, ivy, and dense landscaping
Misting Systems and In2Care-Style Stations
misting $2,000–$4,500 installed plus refills; stations $200–$500 per season
For a San Antonio yard that hosts a lot of outdoor living, a fixed misting system releases insecticide from nozzles on a timer. It is the highest-cost option and needs regular refills.
- Time
- Misting: half a day. Stations: under an hour.
- Best for
- Specific yards: heavy outdoor use or spray-averse owners
Prices are typical published ranges. Ask what’s included before you compare quotes.
Adult mosquitoes spend the day in shady, leafy beds like this one, so that's where a barrier treatment goes.Which mosquitoes bite around San Antonio.
They also bite by day, often near or inside homes. House mosquitoes (Culex) bite from dusk into the night. They breed in storm drains. They're the main West Nile carriers. Asian tiger mosquitoes are common around San Antonio. They're black-and-white and bite by day. They breed in small containers. Yellow fever mosquitoes live around San Antonio too.
Local mosquitoes conditions in San Antonio.
San Antonio sits in a local climate, and that sets the pace for mosquito activity here: the warmer months. The area is mostly residential, so mosquitoes pressure can differ from one block to the next depending on how tight the entry points are and how much food, water, or shelter is close by. An inspection in San Antonio usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing San Antonio's seasonal timing lets you schedule treatment before the busy stretch rather than after it, which usually means faster service and a more accurate quote. A provider who works San Antonio and Texas every day can point out the specific conditions that matter most here, and getting the scope, price, and follow-up terms in writing makes it easier to compare options.
Mosquitoes that bite indoors usually slip in through gaps around doors or torn window screens.Mosquito season in San Antonio.
That's a long season. Plan on regular visits. West Nile cases usually peak in late summer.
A year of mosquitoes in San Antonio.
- Fall: numbers stay high. Keep gutters clear of leaves. - Winter: a good time to fix drainage and low spots. - Spring: the first wave arrives early in San Antonio. Start treatments then. - Summer: with highs near 96°F in San Antonio, check water twice a week.
The weekly water walk.
- Tarps and covers: pull them tight so water runs off. - Birdbaths: change the water twice a week. - Pet bowls: refresh daily. - AC drip lines and downspouts: make sure water drains away. - Tree holes: fill them with sand. - Gutters: clear leaves so water drains. - Saucers and pots: empty them or add sand. - Toys and buckets: store them upside down.
Avoiding bites.
- Screens: repair holes in window and door screens. - Timing: tiger mosquitoes bite by day; house mosquitoes at dusk. - Repellent: DEET, picaridin, IR3535 or oil of lemon eucalyptus. - Clothing: long sleeves and pants help at dusk. - Fans: a patio fan keeps weak-flying mosquitoes away.
Low-cost ways to cut mosquitoes.
- Trimming: thin out dense shrubs and tall grass. - Lights: yellow bug lights attract fewer insects to the porch. - Mosquito dunks: Bti tablets kill larvae in rain barrels and ponds. - Mosquito fish: they eat larvae in ornamental ponds. - Pumps and fountains: moving water breeds far fewer mosquitoes.
Mosquito or look-alike?
- Mosquitoes: slim, long legs, and a needle-like mouth. - Crane flies: look like giant mosquitoes. They don’t bite. - Non-biting midges: swarm near water at dusk. Harmless, just annoying. - No-see-ums: tiny biting gnats near marshes. Screens need a finer mesh.
When a bite needs a doctor.
About one in five get a fever, headache or body aches. See a doctor for high fever, stiff neck or confusion. Spreading swelling or an infected-looking bite needs a check too. Most bites just itch for a few days. Most people infected with West Nile virus never feel sick.
Protecting your pets.
Ask your vet about year-round heartworm prevention. Change pet water bowls daily. Keep pets inside while a yard spray dries. Dogs get heartworm from mosquito bites. Cats can too.
What a treatment visit looks like.
A visit usually takes 20 to 45 minutes. The tech walks the yard first. They dump or treat standing water. Larvicide goes in water you can't drain. Then they spray shady shrubs, where adults rest. Most plans repeat every three to four weeks.
Rain barrels and ponds.
- Gutters: clear them so water drains away. - Tarps: shake out any that hold rainwater. - Pool covers: drain standing water after rain. - Barrels: cover openings with fine mesh. - Ponds: fish and moving water keep larvae down. - Bird baths: change the water every few days.
Questions to ask before you sign.
- What happens if bites come back between visits? - How do you protect bees and flowers? - When can kids and pets go back outside? - What product will you spray? - How often will you come? - Do you treat standing water too?
What affects the price
- Misting system installation and refills.
- In2Care-style station count and servicing.
- One-time visit versus a seasonal plan.
- Special-event timing and rush scheduling.
- Commercial or multi-unit property.
- Number of visits the local season needs.
📊
What's your biggest concern about mosquitoes?
When to call for help
early in the season, before the first big wave. Ponds, drains and dense shrubs are hard to handle yourself. Call if bites still keep you indoors. Dumping water should come first.
What you can do yourself
The biggest win is free: dump standing water every week. Use repellent and run a fan on the patio. A pro adds larvicide for water you can't drain. They also spray where adults rest, every few weeks.
Mosquitoes in San Antonio
Summer highs around 96°F in San Antonio speed up the life cycle, and average humidity near 67% keeps adults active. In denser parts of San Antonio, storm drains, catch basins and gutters are big breeding spots. With about 33 inches of rain a year in San Antonio, any container left out will hold water within days.
Local research
Mosquitoes in San Antonio, TX: what the public record shows
Before you compare quotes, it helps to know which mosquitoes actually live in Texas, when they are busiest around San Antonio, and what the state figures look like. Everything below links to the agency or university page it came from.
West Nile neuroinvasive disease cases, 2024
Neuroinvasive counts are the most reliable state comparison because nearly all severe cases are diagnosed and reported.
CDCOther arboviral disease, 2024
Other mosquito-borne (or, for Powassan, tick-borne) viruses that appear in this state's 2024 surveillance.
CDCMosquito species recorded in Texas
- Yellow fever mosquito (Aedes aegypti) — CDC lists Aedes aegypti as more likely than Ae. albopictus to spread dengue, Zika, and chikungunya; prefers human hosts and lives in and around homes. Tropical, subtropical, and…
When mosquitoes are busiest around San Antonio
Long season; Texas DSHS notes mosquitoes remain active into November and December in much of Texas. CDC WNV season is June–October with a late-August/early-September peak.
Texas DSHS: mosquitoes remain active into November and December in much of Texas. CDC lists Texas among states with limited local dengue spread.
Rules that apply in Texas
For context, nationally
- 1,808 — West Nile virus disease cases reported, 2024. CDC
- 1,347 (75% of cases); 173 deaths — West Nile neuroinvasive disease cases, 2024. CDC
Sources: CDC; Texas Department of State Health Services; Potential Range of Aedes Mosquitoes. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep mosquitoes away
- Tighten lids on trash and recycling bins.
- Cover or drill drainage holes in tires.
- Rake leaf litter from shaded beds.
- Book barrier treatments before the season starts.
- Wear DEET or picaridin repellent outdoors.
When you compare quotes, look at the season total, how many visits it covers and what happens if the bites come back.Did you know?
Larvae are called wrigglers; pupae are tumblers
Some species' eggs survive dry for months
Questions people ask
Do I need a seasonal plan or is one treatment enough?
Barrier sprays fade in three to four weeks. Steady relief takes repeat visits. One treatment helps for an event or a few weeks.
What should I do before the pro arrives?
Move toys and pet bowls. Tell them where you get bitten most. Dump standing water.
Can I get rid of mosquitoes permanently?
They fly in from nearby. Removing water and spraying resting spots cuts them down a lot. Not completely.
What if the mosquitoes are coming from my neighbor's property?
Treat your own yard and talk to your neighbor. Your local mosquito control district or health department can also help. That's common.
Can mosquito control help with West Nile risk?
It can lower it by cutting the number of biting mosquitoes. Repellent and dumping standing water still matter most.
What do most homeowners do about yard mosquitoes?
For San Antonio homes, For San Antonio homes, mosquito control works by removing standing water, treating the water that cannot be drained, and applying barrier treatments where adults rest. For San Antonio homes, because they keep breeding through the season, an ongoing plan usually works best.
Do mosquitoes really change how people use their yards?
For San Antonio homes, For San Antonio homes, mosquito control works by removing standing water, treating the water that cannot be drained, and applying barrier treatments where adults rest. For San Antonio homes, because they keep breeding through the season, an ongoing plan usually works best.
When is mosquito season in San Antonio?
It runs from about March into November. Daytime biters are tiger mosquitoes; evening biters are usually house mosquitoes.
Do mosquitoes in San Antonio carry West Nile?
Cases usually peak in late summer. Repellent and dumping standing water are your best protection. They can. West Nile is found in every lower-48 state, Texas included.
Nearby cities
Related guides
Sources (3)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Mosquito Exterminator · Updated September 11, 2026 · How we write these guides