No-see-ums are tiny biting midges that swarm Florida’s humid coastlines and marshes. These nearly invisible pests cause itchy, painful bites, especially at dawn and dusk. Learn how to identify them, avoid them, and reclaim your outdoor space with tips and treatments.
These pests may be small, but their impact is big, ruining backyard gatherings, disturbing sleep, and turning dream vacations into itchy nightmares. From why their bites linger to how they slip through screens, understanding no-see-ums is the first step toward finally getting relief.
If you're a Florida homeowner dealing with these biting nuisances, Hoffer Pest Solutions offers local, environmentally responsible treatment plans tailored to your area’s specific risks, including marshes, brackish water, and coastal proximity. With over 40 years of trusted service, our team can help protect your home and restore your peace of mind.
If you’re looking for a complete guide to no-see-ums in Florida, including when they’re most active, what repels them, and how to keep them out for good, read on.
Why Do No-See-Ums Bite? And Why Do Their Bites Last So Long?
Here’s the uncomfortable truth: it’s the females doing the biting. Like mosquitoes, female no-see-ums require a blood meal in order to produce eggs. Males stick to nectar, but the females use their saw-like mouthparts to slice into the skin and feed, leaving behind itchy, red bumps that can last for days.
While some people only develop mild skin irritation, others suffer intense reactions. The bites often swell into raised welts or blister-like bumps, accompanied by relentless itching. This is especially true for those with more sensitive immune systems, where even a single bite can trigger days of discomfort, inflammation, and sleepless nights. Some people report allergic-like reactions, an unfortunate side effect of how your body releases histamine in response to the midge’s saliva.
So why do no-see-um bites seem to linger longer than mosquito bites? It comes down to the way your skin reacts to the proteins in the insect’s saliva. The histamine response causes localized inflammation, and in some individuals, that immune overreaction keeps the itching alive far longer than you’d expect. Scratching only makes it worse, potentially breaking the skin and inviting infection.
And yes, scratching a no-see-um bite can lead to secondary infections, especially if bacteria enter the open wound.
For relief, some Floridians swear by unconventional methods like pressing a hot spoon to the bite. The heat is said to denature the proteins that cause itching. Others use lidocaine gels, hydrocortisone creams, or antihistamines. Aloe vera and calamine lotion may soothe the skin, but their effectiveness depends on your body’s unique reaction to the bite.
If you’re one of those unlucky individuals who seems to swell up from a single nibble, you’re not imagining things. For many, these bites are a recurring source of discomfort, irritation, and even anxiety during Florida’s warm seasons.
Where Do No-See-Ums Live and Breed in Florida?
No-see-ums may be hard to spot, but they’re far from rare, especially in Florida’s wetlands and coastal zones. These biting midges thrive in environments with moist, organic matter. Their favorite breeding grounds include salt marshes, mangroves, damp soil, and any area with standing water or high salinity. Unlike mosquitoes that favor open water, no-see-ums lay their eggs in moist soil and mud, making their habitat more difficult to locate and even harder to control.
Storm surges, hurricanes, and even seasonal flooding make the problem worse. After Hurricane Ian, areas like Sanibel and Marco Island saw a spike in no-see-um activity due to freshwater areas turning brackish, an ideal environment for reproduction. Shallow pools of organic-rich water created perfect nurseries for larvae. In fact, even one post-storm puddle in the right conditions can support thousands of developing midges.
The worst-hit zones?
Coastal neighborhoods and waterfront communities, especially on barrier islands like Sanibel, Captiva, and Marco Island. These areas offer all the conditions no-see-ums need: humidity, brackish tidal flats, and minimal wind to disrupt their flight. But don’t think inland Florida gets off easy. Properties near retention ponds, canals, and lakefronts are also highly susceptible, particularly if landscaping encourages moisture retention or if the property has low-lying soil.
Even container gardens and potted plants can unknowingly host no-see-um larvae. Although these insects don’t technically breed indoors, they can reproduce in moist organic matter found in planters or mulch beds that don’t fully dry out. If your patio has planters with poor drainage, you might be unknowingly supporting a thriving midge population right outside your door.
So why do some homes feel like they’re under attack while others down the street seem untouched? It often comes down to microhabitats. Homes surrounded by dense vegetation, shaded areas, or poor drainage tend to trap moisture and offer safe harbor to both larvae and adult midges. If your property backs up to marshland or mangroves, or even has poorly maintained gutters, it’s likely you’re a prime target.
And no, while they may sneak indoors through tiny cracks or unscreened windows, no-see-ums do not breed inside your home. However, a poorly ventilated garage or damp potting shed may still become a temporary refuge if nearby conditions are favorable.
When Is No-See-Um Season in Florida?
Florida’s no-see-um season runs longer than most people expect, typically peaking between March and October. The combination of rising humidity, warmer temperatures, and spring rainfall creates ideal conditions for these pests to breed and feed. While some midges remain active year-round in southern parts of the state, populations surge in the warmer months.
Their feeding schedule is another frustration for residents and visitors alike: dawn and dusk are their prime biting times. During these hours, the air is cooler and calmer, perfect for these weak fliers to swarm undisturbed. Unlike mosquitoes, which tend to buzz and alert you to their presence, no-see-ums operate in stealth mode. You often won’t know they’re feeding until the itching starts.
There’s significant overlap between no-see-um and mosquito seasons, but their habits differ. Mosquitoes prefer standing water and tend to strike at night, while no-see-ums need damp soil and are most aggressive during low-light periods. This means you can be free of mosquitoes but still find yourself under siege from no-see-ums.
Interestingly, dry spells can also trigger outbreaks. That’s because lower water levels concentrate salts in shallow pools and tidal areas, creating hyper-saline environments where no-see-ums reproduce most efficiently. In Florida, this salinity spike typically occurs after winter’s dry season and just before spring rains, a window of intense activity for biting midges.
So yes, Florida absolutely has a no-see-um season, and it tends to coincide with the months most people want to be outdoors.
This seasonal surge can catch visitors off guard. Tourists who book waterfront rentals or plan beach weddings in April or May often find themselves swatting at invisible attackers. Many vacationers leave disappointed, and frustrated, because rental listings rarely warn them about no-see-ums.
The result? Travel regret and itchy reminders that linger long after the trip is over.
If you're a Florida homeowner or landlord, being proactive during peak season is about protecting your family, your guests, and your reputation.
How to Keep No-See-Ums Away from Your Home and Body
No-see-ums may be small, but protecting yourself doesn’t have to be complicated. If you're spending time outdoors, especially at dawn or dusk, physical barriers are your first line of defense. Long-sleeved shirts, pants, and even face coverings can drastically reduce exposed skin and limit bites. Lightweight, breathable fabrics designed for tropical climates can help keep you cool while staying protected.
Repellents are another essential tool. Products containing DEET or Picaridin consistently rank as the most effective against biting midges. However, many Floridians swear by Avon Skin-So-Soft, a moisturizing lotion that seems to repel no-see-ums better than some bug sprays. While not formulated as an insect repellent, its oily consistency may help block bites where other products fail.
Another surprisingly effective method? Fans. No-see-ums are poor fliers, and even a light breeze can throw them off course. Placing box fans around patios or porches can create a protective wind barrier that citronella candles alone can’t replicate. Unlike mosquitoes, which are driven by scent, no-see-ums struggle with any disruption in airflow.
If your screens aren’t cutting it, it may be the mesh, not the pests, that’s the problem. Standard 16-mesh screens don’t stop no-see-ums. You’ll need 20-mesh or higher, often labeled as “no-see-um screen,” to block their tiny entry points. Homes near water, marshland, or shaded yards should especially consider upgrading.
Looking for natural control?
Dragonflies are a powerful (and beautiful) ally. These predators feed on flying insects like no-see-ums and mosquitoes. To attract them, consider planting native vegetation and avoiding chemical sprays that harm beneficial bugs. A thriving native garden doesn’t just beautify, it also defends.
As for essential oils like lemongrass, peppermint, and citronella, they offer mixed results. While these oils can help mask the scent of sweat and CO₂, they wear off quickly and aren’t as effective as synthetic repellents. They're better as a supplement, not a primary defense.
And if you're wondering what kills no-see-ums instantly, the answer isn’t as satisfying as you'd hope. They’re too small and fast for most sprays to knock down immediately. Pyrethrin-based contact sprays can kill them on contact, but prevention is far more reliable than chasing them with aerosol.
No-See-Um Control for Outdoor Living (Without Losing Your Sanity)
If you’re tired of retreating indoors every time the sun sets, it’s time to implement long-term solutions. One of the most effective tools in Florida homes is a misting system, usually installed around the perimeter of a patio or backyard. These systems use botanical oils like pyrethrum, rosemary, or cedar oil to create a timed fog barrier that deters flying insects.
But be cautious when browsing gadgets. Ultrasonic pest repellers, often marketed as a one-size-fits-all solution, have shown little to no success against no-see-ums. Many homeowners report no improvement after weeks of use. Save your money for solutions that have proven impact.
Creating movement zones with box fans is a practical and affordable tactic for family cookouts, evening meals, or lounging poolside. No-see-ums struggle in turbulent air, so even a simple patio fan setup can make a big difference in comfort.
For those looking to enjoy screened-in outdoor spaces, screened lanais are a must. But not just any screen will do. Use no-see-um mesh, which is tighter than typical screens and specifically designed to block midges. Regular mesh will allow them to slip right through.
Multi-purpose tactics like dunk buckets, used to prevent mosquito breeding, also benefit no-see-um control when used in areas where water pools. Though they don’t eliminate midges directly, reducing overall insect populations makes your yard less attractive to flying pests in general.
So, can you build a screened lanai that actually works?
Absolutely, but only if you use the right materials and airflow strategies. Combine fine mesh screens, elevated airflow, and a misting system for a backyard space that’s finally livable again.
Why Do Some People Get Bitten More Than Others?
It’s not your imagination, some people truly are no-see-um magnets. While science hasn’t nailed down a single explanation, a few factors rise to the surface.
No-see-ums are drawn to body heat, sweat, and carbon dioxide, all of which signal a nearby host. People who run warm or sweat easily are more likely to attract bites. So are those who recently exercised or drank alcohol, which increases skin temperature and CO₂ output.
Other theories suggest that blood type, hormones, and even diet might play a role. Some researchers believe people with a “sweeter” skin chemistry, thanks to certain bacteria or natural body oils, emit more attractive scents to biting insects.
There’s also clear variation within households. It’s common to hear families complain that one person gets eaten alive while others are left alone. This may be due to individual immune responses, metabolic differences, or simply varying exposure levels.
So why do some people get bitten while others don’t?
It likely comes down to a mix of biochemistry, behavior, and biology, some of which is under your control (like showering after outdoor time), and some of which, unfortunately, is not.
Is Your Backyard Worth Fighting For?
For many Florida families, outdoor living is a way of life. Barbecues on the patio, sunsets by the canal, kids splashing in the pool, it’s what makes living here special. But all too often, these simple joys are sabotaged by something you can’t even see.
No-see-ums have a way of turning treasured moments into missed opportunities. Families have cut short birthday parties. Couples have postponed beach weddings. Some visitors leave their “dream vacation” with more bites than memories. You shouldn't have to choose between enjoying your backyard and getting bitten alive.
This invisible nuisance limits your freedom. Children come inside crying with itchy welts. Pets can’t lounge outside without scratching themselves raw. And parents are left feeling helpless, watching their evening unwind into discomfort.
How do I protect my dog from no-see-um bites during our evening walks?
The answer lies in both preventative action and professional care. Protective sprays designed for pets (veterinarian-approved), walking during lower-risk times, and avoiding shaded, marshy areas can help. But if your property is the source of the problem, the only lasting solution is eliminating the environment that attracts these pests in the first place.
We believe your home should be a place of peace, not a place where you’re constantly swatting at invisible intruders.
Our mission is simple: protect your family, restore your comfort, and help you get back to loving the outdoors.
What Should Florida Homeowners Do About No-See-Ums?
If you’ve tried every DIY trick in the book and still find yourself retreating indoors at dusk, it may be time to call in the professionals. No-see-ums are notoriously hard to control with over-the-counter solutions, especially if your home is near marshland, retention ponds, or dense vegetation.
That’s where Hoffer Pest Solutions comes in. With over 40 years of experience serving South Florida, we know the habitats, seasons, and behaviors of no-see-ums better than anyone. Our targeted pest management services combine yard inspections, fogging treatments, barrier sprays, and environmental recommendations to reduce infestations without disrupting your lifestyle.
We also understand that every home is unique. Our team creates custom plans based on your property layout, vegetation, proximity to water, and family needs, including pets and children. And because no-see-ums don’t follow a nine-to-five schedule, neither do we. If you call before noon, we offer same-day service.
Wondering if there are native Florida plants that can help? Certain species like marigolds, lemongrass, and lavender may offer mild repellency, but they won’t solve an active infestation on their own. Think of them as part of a broader defense strategy, not a silver bullet.
Ready to reclaim your porch, pool, or patio?
Schedule your property inspection today. We'll evaluate your risks, recommend next steps, and help you enjoy the Florida lifestyle, without the bites.
Florida’s Invisible Pest Is Everyone’s Problem, But You Don’t Have to Fight It Alone
No-see-ums may be small, but the frustration they cause is massive. From sneaking through standard screens to biting when you least expect it, they’re a relentless presence in Florida’s warm, humid climate. And because they’re nearly invisible, they often go unnoticed until it’s too late.
But you don’t have to live in discomfort. Florida is beautiful, and you shouldn’t have to suffer just to enjoy it.
Hoffer Pest Solutions has been helping Florida residents reclaim their homes and outdoor spaces for over 40 years. Our team lives in the communities we serve, and we understand the local ecosystems that allow no-see-ums to thrive. From customized treatment plans to eco-conscious pest control methods, we deliver results without compromising your safety or comfort.
Looking for a comprehensive defense plan?
Don’t let invisible bugs control your home. Take the first step toward a bite-free backyard today. Reach out to Hoffer Pest Solutions for a free inspection and see what true peace of mind feels like.
Frequently Asked Questions (FAQ)
What’s the difference between no-see-ums and mosquitoes?
While both are biting insects, no-see-ums (biting midges) are much smaller, about 1/10 the size of a mosquito, and often go unnoticed until after they bite. They prefer damp soil and marshes, unlike mosquitoes, which breed in standing water.
Can no-see-ums get inside my house?
Yes. No-see-ums are small enough to pass through standard window screens and enter through tiny cracks or gaps in door frames. Upgrading to 20-mesh or “no-see-um mesh” screens can prevent indoor intrusion.
How do I treat no-see-um bites at home?
Apply a cold compress to reduce swelling, followed by anti-itch creams like hydrocortisone or lidocaine gel. Some people find relief using the “hot spoon” method, applying heat to denature itch-causing proteins.
Are no-see-ums active all year in Florida?
They’re most active from March through October, especially after spring rains. However, in South Florida’s warm climate, they can be a year-round nuisance in coastal or marshy areas.
Can professional pest control help with no-see-ums?
Absolutely. We provide targeted treatments including misting systems, barrier sprays, and custom recommendations based on your property’s layout. We specialize in managing pests in high-risk areas like marshlands and waterfront properties.