Termites in Florida: Types, Signs, and Swarm Season

Florida has more established termite species than any other state in the continental United States; 21 species are confirmed by the University of Florida Institute of Food and Agricultural Sciences. The state’s warm, humid climate keeps termite colonies active year-round, and swarm season runs from late fall through early summer depending on the species. Florida is located in Termite Infestation Probability Zone 1, the highest risk category, meaning every property in the state carries a meaningful likelihood of termite activity at some point. Getting the species right matters because the treatment approach differs significantly between subterranean and drywood infestations.

Key Takeaways

• Florida has three main termite types: subterranean, drywood, and dampwood. Subterranean termites are the most destructive; drywood termites are the most common source of infestations in upper floors and attics.
• Swarm season in Florida runs from October through July depending on the species. Seeing winged termites near lights or finding piles of shed wings indoors is one of the earliest signs of a nearby colony.
• Mud tubes on foundation walls and frass, tiny six-sided pellets near baseboards or windowsills, are the two most reliable physical signs of active termite activity.

Signs of Termites in Florida Homes

Termite activity in Florida homes rarely becomes obvious until a colony has been feeding for months. Knowing the physical signs that appear earliest gives homeowners the best chance of catching an infestation before the damage is extensive.

Mud Tubes and Frass

Mud tubes on foundation walls, along floor joists, or running up interior walls are the primary indicator of subterranean termite activity. Finding mud tubes does not always mean active termites are present; colonies sometimes abandon tubes, but any mud tube warrants investigation. Active tubes are solid and intact; abandoned tubes may appear dry or crumbled.

Frass near baseboards, window frames, or below attic access points indicates drywood termite activity. Because drywood termites kick frass out of small holes in the wood, a small pile of pellets typically accumulates in the same spot and reappears after cleaning, which is how homeowners most often confirm an active infestation.

Swarmers and Shed Wings

Swarmers are the reproductive members of a termite colony. They fly to new locations to establish new colonies, and their emergence is often the first visible sign of a mature colony nearby. In Florida, swarmers from different species emerge throughout much of the year: subterranean species swarm from October through May, and drywood species swarm from April through July.

Finding piles of shed wings on windowsills, near light fixtures, or along door frames indoors is one of the most common early signs. Swarmers lose their wings shortly after landing, and finding wings without seeing the swarm itself is typical. Formosan and Asian subterranean termites are attracted to lights at night, so swarmers appearing near lit windows or interior light fixtures in the evening are particularly associated with these species.

Wood Damage

Wood that sounds hollow when tapped, paint that appears to bubble or blister without a water source, and wood surfaces with a layered, honeycomb internal structure when probed are all consistent with termite feeding. Subterranean termite galleries typically contain soil residue because workers carry soil into the wood as they feed. Drywood galleries are clean and smooth, with no soil, which is another visual separator between the two types.

The Three Types of Florida Termites

Florida has three main termite categories: subterranean, drywood, and dampwood. Subterranean infestations require soil treatment; drywood infestations require direct wood treatment or fumigation — identifying the type before calling for treatment determines the entire response.

Subterranean Termites: The Most Destructive

Subterranean termites live in underground colonies and travel through mud tubes to reach wood in structures above the soil. Florida has several species, but two are of greatest concern.

Formosan subterranean termite (Coptotermes formosanus): The most destructive termite in the United States. The University of Florida Institute of Food and Agricultural Sciences describes it as extremely aggressive with colonies that can reach several million individuals. Soldiers make up about 15 percent of a Formosan colony, compared to less than 5 percent in eastern subterranean termite colonies, which reflects the scale of damage these colonies can deliver. Formosan termites are established throughout Florida and can infest living trees as well as structures. They swarm at dusk in late April through May.

Asian subterranean termite (Coptotermes gestroi): Similarly aggressive and most common from Key West to West Palm Beach. Colonies can forage underground up to 100 feet from their central nest before reaching a structure. It swarms at dusk starting in early March in South Florida.

Eastern subterranean termite (Reticulitermes flavipes): The most widespread species in the United States and present throughout Florida. Colonies are smaller and less aggressive than the two invasive species, but established populations cause significant cumulative damage. Swarms in daylight between October and February in Florida.

The signature sign of any subterranean termite is mud tubes, pencil-width tunnels made from soil, wood particles, and termite saliva, running along foundation walls, floor joists, or exterior concrete surfaces. These tubes allow the colony to reach wood above the soil without exposure to open air.

Drywood Termites: No Soil Required

Drywood termites nest entirely within the wood they feed on and require no soil contact or excess moisture to survive. The absence of mud tubes and soil disruption makes them harder to detect than subterranean species, and infestations often go unnoticed until frass accumulates or wood damage becomes visible.

West Indian drywood termite (Cryptotermes brevis): The most destructive drywood species in the United States, with heavy populations across Key West, Fort Lauderdale, Miami, St. Petersburg, and Tampa. It swarms at night from April through July.

The most reliable sign of a drywood termite infestation is frass: tiny six-sided fecal pellets the termites kick out of their galleries. These pellets are often the first thing homeowners notice and resemble coarse coffee grounds or sawdust, appearing near baseboards, windowsills, or below infested furniture. Frass color ranges from beige to dark brown depending on the type of wood being consumed.

Dampwood Termites: A Moisture Indicator

Dampwood termites require wood with high moisture content and are most commonly found in decaying logs, wood piles, and structural wood affected by plumbing leaks or roof failures. They do not build mud tubes or maintain soil contact. Their presence usually signals an underlying moisture problem that also needs to be addressed separately.

Dampwood termites are larger than the other types; swarmers can reach 3/4 of an inch in length, and they are found throughout Florida, particularly in coastal areas. They cause less structural damage than subterranean species but are a reliable indicator that water infiltration is occurring somewhere in the structure.

Swarm Season in Florida: When Each Species Is Active

Florida’s climate compresses termite swarm season differently from any other state. Swarming activity runs almost continuously from late fall through early summer, with different species peaking at different times.

Eastern subterranean termites swarm in daylight from October through February. Starting in early March, the Asian subterranean termite swarms at dusk in South Florida. Formosan subterranean termites swarm at night in late April through May, and the West Indian drywood termite swarms at night from April through July.

This overlapping calendar means Florida homeowners may encounter swarmers at almost any point during the cooler half of the year through early summer, with the peak activity window running from March through June. Annual termite inspections are particularly important in Florida because colonies are active year-round even when swarmers are not visible.

Why Florida Has the Most Severe Termite Pressure in the Country

Florida’s termite pressure exceeds similarly warm states because of two invasive species that are not present elsewhere in the country at the same scale. Both the Formosan and Asian subterranean termites form colonies of several million individuals, can infest living trees as well as structures, and forage up to 100 feet underground from a single nest. Termite colonies are always active; the swarm is simply when they become visible.

The Formosan and Asian species are established throughout Florida and, according to researchers at the University of Florida Institute of Food and Agricultural Sciences Fort Lauderdale Research and Education Center, some Florida cities are in the process of losing their urban tree canopy because these invasive colonies infest mature trees that cannot be replaced. Homeowners in South Florida, where the Asian subterranean termite is most concentrated, face particularly high pressure. Given Florida’s year-round termite activity and the presence of multiple invasive species, annual inspections are the standard professional recommendation for all Florida properties.

When to Call Nextgen Pest Solutions

Call us when you see swarmers or shed wings indoors, when you find mud tubes on foundation walls or floor joists, when frass is appearing near baseboards or windowsills, or when wood anywhere in the structure sounds hollow or shows visible damage. Termite infestations are almost never visible until they have been active for months; any sign warrants a professional inspection rather than a wait-and-see approach.

Professional service makes sense when:

• You have seen swarmers or found piles of shed wings inside the home.
• Mud tubes have appeared on the foundation, walls, or crawl space.
• Frass is accumulating near baseboards, windowsills, or below attic access points.
• Wood in floors, walls, or ceiling areas sounds hollow when tapped.
• You are buying, selling, or refinancing a property and need a Wood Destroying Insect Report (WDIR).
• You want an annual inspection as part of ongoing prevention.

Nextgen Pest Solutions provides termite control services across Florida, treating both subterranean and drywood termite infestations. Services include thorough inspection, customized treatment plans, and Wood Destroying Insect Reports for real estate transactions. Treatments are kid and pet friendly, and if termites return, Nextgen comes back at no additional charge.

Schedule a Termite Inspection in Florida

If you have seen any signs of termite activity or want an annual inspection, we can assess your property, identify the species present, and recommend a treatment approach based on what is actually there.

Contact Nextgen Pest Solutions or call (561) 623-3375 to schedule an inspection. Same-day and next-day service is available, with 24-hour emergency service for urgent situations.

Frequently Asked Questions