The short version
Around Los Angeles, 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.
Anyone in Los Angeles tired of mosquito bites at home.
What to look for
In summer heat, eggs become biting adults in about a week. Often the source is a neighbor's yard or a storm drain. Mosquitoes breed in standing water, even a bottle cap's worth.
- 1Bites within minutes of stepping outside at dusk.
- 2Swarms rising from shrubs when you brush past.
- 3A neighbor's pool turning green and untended.
- 4Wriggling larvae in birdbaths, buckets, or saucers.
- 5Tarps, toys, or tires holding rainwater.
- 6A sump pit or crawl space holding 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)
Most mosquitoes biting you in Los Angeles were born within a few hundred feet of your door, so the inspection maps every container, drain, and puddle on the lot. That map becomes the treatment plan.
- Time
- 30–60 minutes
- Best for
- Every yard; finds where mosquitoes actually breed
Source Reduction and Larviciding
$75–$150 per visit
Larvicide hits mosquitoes before they can fly, which is why pros in Los Angeles build every plan around it. 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
Crews should skip blooming plants and vegetable beds when spraying a Los Angeles property to protect bees and food crops. A careful applicator treats resting cover, not the whole yard.
- 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 Los Angeles 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.
Leaf-clogged gutters and downspouts hold water out of sight. Clearing them in fall means fewer places to breed in spring.Which mosquitoes bite around Los Angeles.
Near the coast, salt-marsh mosquitoes can fly into Los Angeles from miles away. They're the main West Nile carriers. They breed in storm drains. House mosquitoes (Culex) bite from dusk into the night. They also bite by day, often near or inside homes. Yellow fever mosquitoes live around Los Angeles too. They breed in small containers. They're black-and-white and bite by day. Asian tiger mosquitoes are common around Los Angeles.
Local mosquitoes conditions in Los Angeles.
A provider who works Los Angeles and California 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. Knowing Los Angeles'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. An inspection in Los Angeles usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Around Los Angeles, the area is mostly urban, 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. Los Angeles sits in a mediterranean climate, and that sets the pace for mosquito activity here: late spring through early fall; year-round in the deep south.
Mosquitoes that bite indoors usually slip in through gaps around doors or torn window screens.Mosquito season in Los Angeles.
That's a long season. Plan on regular visits. West Nile cases usually peak in late summer.
A year of mosquitoes in Los Angeles.
- Spring: the first wave arrives early in Los Angeles. Start treatments then. - Summer: with highs near 84°F in Los Angeles, check water twice a week. - Fall: numbers stay high. Keep gutters clear of leaves. - Winter: a good time to fix drainage and low spots.
The weekly water walk.
- Tree holes: fill them with sand. - AC drip lines and downspouts: make sure water drains away. - Pet bowls: refresh daily. - Birdbaths: change the water twice a week. - Tarps and covers: pull them tight so water runs off. - Toys and buckets: store them upside down. - Saucers and pots: empty them or add sand. - Gutters: clear leaves so water drains.
Avoiding bites.
- Timing: tiger mosquitoes bite by day; house mosquitoes at dusk. - Screens: repair holes in window and door screens. - Fans: a patio fan keeps weak-flying mosquitoes away. - Clothing: long sleeves and pants help at dusk. - Repellent: DEET, picaridin, IR3535 or oil of lemon eucalyptus.
Low-cost ways to cut mosquitoes.
- Lights: yellow bug lights attract fewer insects to the porch. - Trimming: thin out dense shrubs and tall grass. - Pumps and fountains: moving water breeds far fewer mosquitoes. - Mosquito fish: they eat larvae in ornamental ponds. - Mosquito dunks: Bti tablets kill larvae in rain barrels and ponds.
Mosquito or look-alike?
- Mosquitoes: slim, long legs, and a needle-like mouth. - No-see-ums: tiny biting gnats near marshes. Screens need a finer mesh. - Non-biting midges: swarm near water at dusk. Harmless, just annoying. - Crane flies: look like giant mosquitoes. They don’t bite.
When a bite needs a doctor.
Most bites just itch for a few days. Most people infected with West Nile virus never feel sick. 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.
Protecting your pets.
Heartworm reaches dogs through mosquito bites, and cats can get it as well; Los Angeles's June–October season is long enough that most vets advise year-round prevention. Talk to your vet about year-round prevention. Refresh pet water bowls daily; in dry Los Angeles a bowl or an irrigation puddle is often the only standing water on the block. Keep animals inside until a yard treatment dries.
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.
- Pool covers: drain standing water after rain. - Tarps: shake out any that hold rainwater. - Gutters: clear them so water drains away. - Bird baths: change the water every few days. - Ponds: fish and moving water keep larvae down. - Barrels: cover openings with fine mesh.
Questions to ask before you sign.
- When can kids and pets go back outside? - How do you protect bees and flowers? - What happens if bites come back between visits? - Do you treat standing water too? - How often will you come? - What product will you spray?
What affects the price
- One-time visit versus a seasonal plan.
- Gutter cleaning or drainage fixes bundled in.
- Lot size and total acreage treated.
- Ponds, creeks, or wetland edges on the property.
- Standing water requiring larvicide.
- Special-event timing and rush scheduling.
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What's your biggest mosquito concern?
When to call for help
Ponds, drains and dense shrubs are hard to handle yourself. early in the season, before the first big wave. Dumping water should come first. Call if bites still keep you indoors.
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 Los Angeles
In denser parts of Los Angeles, storm drains, catch basins and gutters are big breeding spots. Summer highs around 84°F in Los Angeles speed up the life cycle, and average humidity near 71% keeps adults active. Los Angeles only gets about 15 inches of rain a year, so local mosquitoes breed where people add water: sprinklers, pools, fountains and AC drips.
Local research
Mosquitoes in Los Angeles, CA: what the public record shows
Before you compare quotes, it helps to know which mosquitoes actually live in California, when they are busiest around Los Angeles, 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.
CDCMosquito species recorded in California
- 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 Los Angeles
Washington DOH: detections from May (earliest) to October (latest). California reports its heaviest WNV activity in late summer; CDC peak is late August to early September.
CDC lists California among states with limited local dengue spread from Aedes aegypti.
Rules that apply in California
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; California Department of Public Health / MVCAC; Potential Range of Aedes Mosquitoes. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep mosquitoes away
- Keep tarps taut so they shed water.
- Store buckets, wheelbarrows, and toys upside down.
- Book barrier treatments before the season starts.
- Tighten lids on trash and recycling bins.
- Talk with neighbors about shared breeding sites.
- Fix low spots that hold water for days.
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?
Over 3,500 mosquito species exist worldwide
Mosquitoes home in on carbon dioxide from breath
Questions people ask
What does a mosquito inspection involve?
Gutters, saucers, tarps and low spots get checked first. They also check shady spots where adults rest. The tech walks the yard looking for standing water.
How long does a mosquito treatment last?
A barrier spray usually lasts three to four weeks. Heavy rain can shorten that.
What should I do before the pro arrives?
Tell them where you get bitten most. Move toys and pet bowls. Dump standing water.
What if the mosquitoes are coming from my neighbor's property?
Your local mosquito control district or health department can also help. Treat your own yard and talk to your neighbor. That's common.
Will mosquito treatment kill bees and butterflies?
Spraying when bees rest helps too. Ask them to skip blooming plants. It can if spray hits flowers.
Do mosquitoes really change how people use their yards?
Around Los Angeles, mosquito control works by removing standing water, treating the water that cannot be drained, and applying barrier treatments where adults rest. Around Los Angeles, because they keep breeding through the season, an ongoing plan usually works best.
When is mosquito season in Los Angeles?
It runs from about March into November. Daytime biters are tiger mosquitoes; evening biters are usually house mosquitoes.
Do mosquitoes in Los Angeles carry West Nile?
Repellent and dumping standing water are your best protection. Cases usually peak in late summer. West Nile is found in every lower-48 state, California included. They can.
Nearby cities
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Sources (11)
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