The short version
Around Charleston, mosquito season runs from about April through October. Treatment means removing water and treating what you can't drain. A barrier spray follows every few weeks.
- 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 Charleston who want their yard back.
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.
- 1Wriggling larvae in birdbaths, buckets, or saucers.
- 2Swarms rising from shrubs when you brush past.
- 3Mosquitoes indoors resting on walls or in closets.
- 4Ornamental pond with no fish or pump.
- 5Rain barrels without screens or lids.
- 6Corrugated downspout extensions that never drain.
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 📅
Mosquito activity through the year in Charleston
Spring
the first wave arrives early in Charleston. Start treatments then.
Summer
with highs near 90°F in Charleston, check water twice a week.
Fall
numbers stay high. Keep gutters clear of leaves.
Winter
a good time to fix drainage and low spots.
Treatment options and typical costs
Property Inspection for Breeding Sites
$0–$150 (often bundled with a first treatment)
Expect a written or verbal summary of what was found on your Charleston property, including problems on the neighbor's side of the fence. You cannot treat next door, but you can plan around it.
- 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
Most programs use a pyrethroid spray from a backpack mister. It fades over three to four weeks. Repeat visits keep the coverage up through the season.
- 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
Stations suit small Charleston lots, townhome yards, and properties where the owner would rather not have spray. They work slowly, so pair them with source reduction.
- 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
Ask how they handle bites that return between visits. Many plans include a re-spray within a set number of days.
- 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.
Leaf-clogged gutters and downspouts hold water out of sight. Clearing them in fall means fewer places to breed in spring.How mosquito treatment works in Charleston.
Barrier spray covers shady shrubs and leaves. Larvicide handles water you can't drain, like ponds or drains. Around Charleston, the season runs from about April through October, so a plan usually starts in spring and runs to the end of the season. Then spray where the adults rest. First, find and remove the water where they breed. Treatment has two parts.
Which mosquitoes bite around Charleston.
They're the main West Nile carriers. They breed in storm drains. House mosquitoes (Culex) bite from dusk into the night. They breed in small containers. They're black-and-white and bite by day. Asian tiger mosquitoes are common around Charleston.
Mosquitoes that bite indoors usually slip in through gaps around doors or torn window screens.Mosquito season in Charleston.
That's a long season. Plan on regular visits. West Nile cases usually peak in late summer.
A year of mosquitoes in Charleston.
- Spring: the first wave arrives early in Charleston. Start treatments then. - Summer: with highs near 90°F in Charleston, 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; Charleston's season runs roughly May into December, so year-round prevention is the usual advice. Talk to your vet about year-round prevention. Refresh pet water bowls daily; with about 51 inches of rain a year in Charleston, bowls and plant saucers refill themselves. 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
- In2Care-style station count and servicing.
- Synthetic versus botanical barrier products.
- Re-treatment policy between scheduled visits.
- Commercial or multi-unit property.
- Local labor rates and licensing costs.
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What's your biggest concern about mosquitoes?
When to call for help
Call if bites still keep you indoors. Dumping water should come first. early in the season, before the first big wave. Ponds, drains and dense shrubs are hard to handle yourself.
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 Charleston
A local provider who knows Charleston and South Carolina can point out the specific conditions that matter most here before you commit to a plan. Around Charleston, take a minute to note where you have seen activity and when it appears, so the inspection is faster and the quote more accurate. Around Charleston, most of the housing is urban, so the usual entry points, moisture spots, and sheltered areas near the structure are what an inspection checks first. Charleston has a humid subtropical climate, and mosquitoes activity here tends to pick up late spring through early fall; year-round in the deep south. In denser parts of Charleston, storm drains, catch basins and gutters are big breeding spots. Summer highs around 90°F in Charleston speed up the life cycle, and average humidity near 73% keeps adults active. Charleston gets about 51 inches of rain a year, so containers and low spots refill constantly through the season.
Local research
Mosquitoes in Charleston, SC: what the public record shows
Before you compare quotes, it helps to know which mosquitoes actually live in South Carolina, when they are busiest around Charleston, 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.
CDCWhen mosquitoes are busiest around Charleston
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.
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. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep mosquitoes away
- Empty plant saucers after every rain.
- Talk with neighbors about shared breeding sites.
- Keep tarps taut so they shed water.
- Tighten lids on trash and recycling bins.
- Add fish or a pump to ornamental ponds.
- Drop Bti dunks in water you cannot drain.
Jot down where you found standing water and when you get bitten. It gives a pro a head start.Did you know?
Mosquitoes home in on carbon dioxide from breath
Over 3,500 mosquito species exist worldwide
Questions people ask
How do I choose a mosquito control company?
Ask what happens if bites come back. Ask what products they use and how often they visit. Check that they're licensed in South Carolina.
Can I get rid of mosquitoes permanently?
Removing water and spraying resting spots cuts them down a lot. They fly in from nearby. Not completely.
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.
What is the difference between larvicide and barrier spray?
Most plans use both. Barrier spray goes on leaves where adults rest. It stops larvae from maturing.
Is mosquito spraying safe for pets, kids, and bees?
Ask them to avoid flowers. Keep kids and pets inside until it dries. Applied by the label, it's considered low risk once dry.
Do store-bought mosquito products actually work?
Around Charleston, dIY sprays and foggers give temporary relief, but they do not stop the next generation from breeding in the standing water nearby. Around Charleston, the most effective DIY step is removing the water, and professional larvicide and barrier treatments handle the rest.
What do most homeowners do about yard mosquitoes?
Around Charleston, mosquito control works by removing standing water, treating the water that cannot be drained, and applying barrier treatments where adults rest. Around Charleston, because they keep breeding through the season, an ongoing plan usually works best.
When is mosquito season in Charleston?
It runs from about April through October. Daytime biters are tiger mosquitoes; evening biters are usually house mosquitoes.
Do mosquitoes in Charleston 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, South Carolina included. They can.
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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