The short version
Around Irvine, 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 Irvine 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.
- 1Welts on ankles and calves after yardwork.
- 2Kiddie pools left full for days.
- 3Whining near your ears at night indoors.
- 4Swarms rising from shrubs when you brush past.
- 5Egg rafts floating on stagnant water.
- 6Adults resting under deck boards or in ivy.
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)
Before anything is sprayed, a pro in Irvine should work out which mosquito you have and where the larvae are growing. Container breeders and floodwater breeders call for different tactics.
- Time
- 30–60 minutes
- Best for
- Every yard; finds where mosquitoes actually breed
Barrier (Residual) Yard Treatment
$75–$200 per visit; $350–$900 per season
Barrier spray is the workhorse of mosquito control in Irvine, 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 an Irvine 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
Monitoring and Seasonal Plans
$50–$150 per follow-up visit; $350–$900 per season bundled
A good pro checks landing counts between visits. Numbers climbing early means a missed breeding site.
- Time
- 15–30 minutes per check; season runs spring through first frost
- Best for
- Anyone who wants the yard usable all summer
Prices are typical published ranges. Ask what’s included before you compare quotes.
A treatment visit covers the shaded plants and beds where adults rest, along with any standing water that can't be drained.Which mosquitoes bite around Irvine.
They're the main West Nile carriers. Near the coast, salt-marsh mosquitoes can fly into Irvine from miles away. Asian tiger mosquitoes are common around Irvine. They're black-and-white and bite by day. They breed in small containers. Yellow fever mosquitoes live around Irvine too. They also bite by day, often near or inside homes. House mosquitoes (Culex) bite from dusk into the night. They breed in storm drains.
Local mosquitoes conditions in Irvine.
Knowing Irvine'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 Irvine 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. Irvine 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. In Irvine, 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. An inspection in Irvine usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first.
Mosquitoes that bite indoors usually slip in through gaps around doors or torn window screens.Mosquito season in Irvine.
West Nile cases usually peak in late summer. That's a long season. Plan on regular visits.
A year of mosquitoes in Irvine.
- Summer: with highs near 83°F in Irvine, check water twice a week. - 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 Irvine. Start treatments then.
The weekly water walk.
- Toys and buckets: store them upside down. - 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.
Avoiding bites.
- Fans: a patio fan keeps weak-flying mosquitoes away. - 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.
Low-cost ways to cut mosquitoes.
- Pumps and fountains: moving water breeds far fewer 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.
Mosquito or look-alike?
- No-see-ums: tiny biting gnats near marshes. Screens need a finer mesh. - 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.
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.
Dogs get heartworm from mosquito bites. Cats can too. Ask your vet about year-round heartworm prevention. Change pet water bowls daily. Keep pets inside while a yard spray dries.
What a treatment visit looks like.
Larvicide goes in water you can't drain. Then they spray shady shrubs, where adults rest. Most plans repeat every three to four weeks. A visit usually takes 20 to 45 minutes. The tech walks the yard first. They dump or treat standing water.
Rain barrels and ponds.
- Bird baths: change the water every few days. - 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.
Questions to ask before you sign.
- Do you treat standing water too? - 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?
What affects the price
- Travel distance from the company's base.
- Local labor rates and licensing costs.
- Amount of shade and dense vegetation.
- Standing water requiring larvicide.
- Number of visits the local season needs.
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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
A pro adds larvicide for water you can't drain. They also spray where adults rest, every few weeks. The biggest win is free: dump standing water every week. Use repellent and run a fan on the patio.
Mosquitoes in Irvine
Summer highs around 83°F in Irvine speed up the life cycle, and average humidity near 67% keeps adults active. In denser parts of Irvine, storm drains, catch basins and gutters are big breeding spots. Irvine only gets about 14 inches of rain a year, so local mosquitoes breed where people add water: sprinklers, pools, fountains and AC drips.
Local research
Mosquitoes in Irvine, 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 Irvine, 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 Irvine
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
- Check AC drip lines and sump pits.
- Repair torn window and door screens.
- Store buckets, wheelbarrows, and toys upside down.
- Wear DEET or picaridin repellent outdoors.
- Drain kiddie pools when playtime ends.
- Book barrier treatments before the season starts.
Jot down where you found standing water and when you get bitten. It gives a pro a head start.Did you know?
Some species' eggs survive dry for months
Mosquitoes home in on carbon dioxide from breath
Questions people ask
Are misting systems worth it?
They're costly to install and need refills. Most yards do fine with source removal and regular spraying. For a few homes, yes.
What are In2Care stations and do they work?
Mosquitoes visit, then carry larvicide to other water. They work best against container breeders like tiger mosquitoes. They're small water traps.
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.
How do I choose a mosquito control company?
Ask what products they use and how often they visit. Ask what happens if bites come back. Check that they're licensed in California.
What is the difference between larvicide and barrier spray?
Barrier spray goes on leaves where adults rest. Most plans use both. It stops larvae from maturing.
How likely are homeowners to hire a mosquito control service?
In Irvine, In Irvine, mosquito control works by removing standing water, treating the water that cannot be drained, and applying barrier treatments where adults rest. In Irvine, because they keep breeding through the season, an ongoing plan usually works best.
How often does mosquito treatment need to be redone?
In Irvine, In Irvine, mosquito control works by removing standing water, treating the water that cannot be drained, and applying barrier treatments where adults rest. In Irvine, because they keep breeding through the season, an ongoing plan usually works best.
When is mosquito season in Irvine?
It runs from about March into November. Daytime biters are tiger mosquitoes; evening biters are usually house mosquitoes.
Do mosquitoes in Irvine 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, California included.
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