Key takeaways
- Florida's top summer pests are ants, cockroaches, mosquitoes, rodents, spiders, wasps and bees, and termites.
- Heavy summer rain drives fire ants to higher ground or indoors and can push American cockroaches inside from sewers and mulch.
- The roof rat is the worst rodent pest in Florida; it nests in attics and palm skirts and travels up to 150 yards for food.
- Yellowjackets nest underground and can sting repeatedly; nests near the house are a job for a professional.
- Brown recluse spiders are not established in Florida, but widow spiders, including the brown widow, hide around sheds, grills and play sets.
In this article
The most common summer pests in Florida are ants, cockroaches, mosquitoes, rodents, spiders, wasps and bees, and termites. Heat, humidity and the daily storms of the rainy season give all seven more food, more water and more reasons to move into your home.
Florida pests do not disappear in winter, but summer turns up the volume. Rain floods ant colonies and cockroach hiding spots, every container in the yard becomes a mosquito nursery, and wasp colonies reach their full size. Below is what each of the seven looks like in a South Florida summer, the signs to watch for and what actually keeps it out.
Why Summer Brings More Pests Into Florida Homes
South Florida’s rainy season runs roughly from May through October, and that is the main driver. Downpours saturate the soil, fill containers and flood the mulch, sewers and tree holes where many pests live. Pests respond by breeding faster outdoors and moving indoors to stay dry. Hurricanes and tropical storms add debris, flooding and damaged roofs and screens that make entry even easier. Our article on why there are more bugs in the summer explains the biology behind the seasonal boom.
| Pest | Why summer makes it worse | Signs to watch for | Main risk |
|---|---|---|---|
| Ants | Rain floods nests; colonies move to higher ground or indoors | Trails along counters, outlets and windows | Food contamination, stings (fire ants) |
| Cockroaches | Heavy rain pushes them in from sewers and mulch | Roaches at night near drains, droppings | Bacteria and other pathogens |
| Mosquitoes | Rain refills containers every few days | Daytime bites, larvae in standing water | Itchy bites, mosquito-borne disease |
| Rodents | Fruit trees and dense growth supply food and cover | Droppings, gnawing, noises in the attic | Chewed wires, contamination |
| Spiders | More insects to eat around lights and plants | Webs in corners, garages and eaves | Widow bites (rare but serious) |
| Wasps and bees | Colonies grow all summer | Insects flying in and out of the ground or eaves | Multiple stings, allergic reactions |
| Termites | Swarms continue into the rainy season | Wings, droppings, mud tubes | Structural damage |
1. Ants
Ants are among the pests Floridians see indoors most often. One of the main culprits is the ghost ant, which UF/IFAS calls one of the most important household ant pests in the state. Workers are only about 1.5 mm long, with a dark head and a pale, almost see-through abdomen, so they are easy to miss until a trail forms.
Ghost ants nest indoors in wall voids and the spaces between cabinets and baseboards, and outdoors in flowerpots, under objects on the ground and under loose bark. They love sweets. Fire ants are a different problem: UF/IFAS notes that after heavy rain, fire ant colonies may move to higher ground or indoors to escape saturated soil.
What helps:
- Keep food in tight containers and wipe up crumbs and sticky spills.
- Fix leaks and condensation that give indoor colonies water.
- Use baits rather than sprays for trailing ants; UF/IFAS says to check that ants are feeding within a day or two and move the bait if not.
Learn to recognize them on our ghost ant page.
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2. Cockroaches
Florida’s warm, wet summers suit cockroaches perfectly. The large ones you see after a storm are usually American cockroaches, often called palmetto bugs. According to UF/IFAS, adults average about 1.5 inches long, live outdoors in hollow trees, woodpiles, mulch and sewers, and come inside through plumbing or from branches that overhang the roof. Infestations can occur after heavy rain.
They are more than a nuisance. Researchers have isolated at least 22 species of disease-causing bacteria, viruses, fungi and protozoa from field-collected American cockroaches, and they soil food and surfaces with droppings.
What helps:
- Caulk gaps where pipes and utility lines enter the walls.
- Rake rotting leaves and keep mulch and woodpiles away from the house.
- Trim branches that touch the roof.
- Fix leaks and reduce damp areas indoors.
See our American cockroach page for identification photos.
3. Mosquitoes
Mosquitoes are the defining pest of a Florida summer. Every afternoon storm refills buckets, plant saucers, gutters and bromeliads, and the CDC says an Aedes egg can become an adult in 7 to 10 days. The Asian tiger mosquito, now found in all 67 Florida counties, breeds in exactly those containers and bites during the day, with peaks in the early morning and late afternoon. It rests in shady shrubs near the ground.
Beyond the itchy bites, mosquitoes can spread diseases such as dengue, so the Florida Department of Health urges Floridians to “Drain and Cover”: drain any container where rain or sprinkler water collects, empty and clean birdbaths and pet bowls at least twice a week, and use a repellent with 10-30% DEET, picaridin, oil of lemon eucalyptus or IR3535. If you are planning outdoor gatherings, our guide to keeping pests away from your summer BBQs covers the party-day details. For yards that stay unusable despite your efforts, Toro’s mosquito control service treats the shrubs where adults rest and the breeding sites you cannot drain.
4. Rodents: Rats and Mice
Florida’s rodent problem is mostly a rat problem, and mostly one species. UF/IFAS calls the roof rat “the worst rodent pest in the state of Florida,” while the Norway rat is rare here. Roof rats nest above ground in attics, soffits, hollow trees and old palm frond skirts, and travel up to 150 yards from the den for food or water.
Summer is when backyard fruit ripens, and roof rats eat most cultivated fruits, plus pet food, bird seed and garbage. In Florida they breed year-round, with peaks in spring and fall, and a female can have 4 or 5 litters a year. Inside, they chew wiring, which can start fires, and gnaw plastic and lead pipes. The roof rat is also a reservoir host for murine typhus, according to the UF/IFAS roof rat guide.
Squirrels are rodents too and sometimes move into attics. Raccoons are not rodents at all; they are wildlife and call for a different removal approach. Learn the signs on our roof rat page.
What helps:
- Pick up fallen fruit and do not leave pet food or bird seed out overnight.
- Trim tree branches and palms back from the roof.
- Remove dead palm fronds, which make ideal nesting spots.
- Seal gaps around the roofline, vents and pipes.
5. Spiders
Most spiders are harmless and even helpful, since they eat flies, mosquitoes and other insects. You will notice more of them in summer simply because there are more insects for them to catch around lights and plants.
Two kinds deserve respect. The Florida Department of Agriculture and Consumer Services says the southern black widow is the most common native widow in the state, and the introduced brown widow is the most human-adapted. Widows favor sheds, water meter holes, nursery pots and anything left undisturbed, like a grill, slide or sandbox. Bite symptoms start about 1 to 3 hours later and include intense pain and muscle cramping, so anyone bitten should see a doctor.
The brown recluse, on the other hand, is not established in Florida; FDACS says no recluse spiders are native here.
What helps:
- Wear gloves when lifting boards, pots or stored boxes.
- Shake out shoes, gloves and clothing that have been sitting unused.
- Knock down webs regularly and reduce outdoor lighting that attracts their prey.
6. Wasps and Bees
Stinging insects are busiest in the warm months. Florida’s yellowjackets nest underground, and UF/IFAS notes that many people discover a nest by running over it with a lawnmower. Unlike honey bees, which die after one sting, yellowjackets can sting repeatedly, and an injured yellowjacket releases an alarm pheromone that sends the whole colony on the defensive.
Colonies die off in winter, except for the mated queens that start new nests in spring, so nests grow bigger and more defensive as summer goes on. Paper wasps add umbrella-shaped nests under eaves and railings.
UF/IFAS recommends hiring a professional for any nest close to your home. Honey bee swarms are a natural, usually non-aggressive stage of colony reproduction, according to UF/IFAS Extension Miami-Dade, but a colony that settles into a wall or soffit needs professional help.
7. Termites
Termite swarms in South Florida run through spring and into the early rainy season. According to UF/IFAS, Formosan subterranean termites swarm from early April to late June, peaking in May, shortly after sunset. West Indian drywood termites, which UF/IFAS calls the preeminent drywood pest of wooden articles in southern Florida, fly mainly from April to June, though flights are possible at any time of year.
Summer storms add another risk: Formosan termites hollow out living trees, which can make them more likely to fall in high winds. Watch for:
- Discarded wings on windowsills and near lights
- Small piles of hard, sand-like droppings below wood (drywood termites)
- Mud tubes on the foundation or walls (subterranean termites)
- Blistered paint or wood that sounds hollow
Toro’s termite control service starts with a free inspection to identify the species, because drywood and subterranean termites need completely different treatments.
How to Keep Summer Pests Out of Your Home
A few routines work against almost all seven:
- Walk the yard after storms and empty anything holding water.
- Seal entry points: gaps around pipes, cables, doors, windows and the roofline.
- Trim vegetation so branches, palms and shrubs do not touch the house.
- Pull mulch back a few inches from the foundation and keep woodpiles away from walls.
- Store food sealed and take out the trash every day.
- Fix leaks and drainage problems quickly; nearly every pest on this list follows moisture.
For a longer prevention plan, read how to prevent common summer pests in Florida.
When to Call a Professional
Call for help when you see pests indoors repeatedly, find signs of rodents or termites, discover a nest near your home or simply want the problem handled before it grows. Toro Pest Management has protected South Florida homes and businesses since 1969, responds within 24 hours, guaranteed, and starts every job with a free inspection. If the bugs come back, so will Toro, at no additional cost to you.
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305-594-4767Frequently Asked Questions
Why do I see more cockroaches after it rains?
Are palmetto bugs and cockroaches the same thing?
Are there brown recluse spiders in South Florida?
Do termites swarm in the summer in Florida?
Is there a pest off-season in South Florida?
Sources
- Ghost Ant, Tapinoma melanocephalum (EDIS IN532), UF/IFAS Extension
- American Cockroach, Periplaneta americana (EDIS IN298), UF/IFAS Extension
- Asian Tiger Mosquito, Aedes albopictus (EDIS IN594), UF/IFAS Extension
- Control of Roof Rats in Fruit Trees, UF/IFAS Extension
- Pest Alert: Venomous Spiders, Widow and Recluse, Florida Department of Agriculture and Consumer Services
- West Indian Drywood Termite, Cryptotermes brevis (EDIS IN236), UF/IFAS Extension
- Formosan Subterranean Termite, Coptotermes formosanus (EDIS IN278), UF/IFAS Extension
- Yellow Jackets, UF/IFAS Gardening Solutions
Educational content. This article is for general information about pests in South Florida and is not medical, legal or professional advice. If you have a bite, sting or allergic reaction, contact your doctor; in an emergency, call 911. Pest problems vary from home to home, so a licensed professional should inspect before treatment. When using any pesticide, always read and follow the product label.
