Polk County Termite Swarm Season & Pest Data Reference
A sourced reference on Central Florida termite swarm timing for Polk County: when native subterranean termites swarm versus drywood termites, how invasive species like the Formosan and Asian subterranean termite fit into the statewide calendar, why Florida’s humidity makes it hospitable to both swarm types, and what the state’s licensing framework requires. Every figure below comes from a public source — the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), the Florida Department of Agriculture and Consumer Services (FDACS), and NOAA climate data — linked at the point of use so it can be independently checked.
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Central Florida Termite Swarm Calendar
| Species | Swarm window | Behavior | Source |
|---|---|---|---|
| Subterranean termite (native, incl. Eastern subterranean) | February through May, peaking after the first warm rains | Colonies live underground and travel into structures via pencil-width mud tubes. Swarms happen during daylight hours, most visibly on warm days following rain. | UF/IFAS EDIS; Native Pest Management / DeBugem swarm-season summaries citing UF/IFAS research |
| Drywood termite | May through August, peaking on warm, humid evenings after rainfall | Colonies live entirely inside the wood they consume. Identified by kick-out holes (pinhead-size) and frass pellets rather than mud tubes. Swarms at night, drawn to light. | UF/IFAS EDIS; FDACS consumer drywood termite guidance |
| Asian subterranean termite (invasive, South FL) | Starting early March | An aggressive invasive species UF/IFAS entomologists track closely in South Florida; large visible swarms are the primary way colonies are first detected. | UF/IFAS blog, “As Florida enters termite swarm season” (March 2021) |
| Formosan subterranean termite (invasive) | Late April through early May | One of the most destructive termite species established in the U.S.; UF/IFAS urban entomologists flag this as the point in spring when Formosan colonies typically begin dispersal flights statewide. | UF/IFAS blog (March 2021); UF/IFAS Fort Lauderdale REC Swarming Events chart |
Subterranean vs. Drywood: Why the Distinction Matters for Treatment
Polk County homes can host either — or both — termite types, and UF/IFAS identification guidance draws a clear behavioral line between them:
| Trait | Subterranean | Drywood |
|---|---|---|
| Colony location | Underground, entering structures via mud tubes | Entirely within the wood being consumed |
| Swarm timing | Daytime, especially after rain | Night, drawn to lights, on warm humid evenings |
| Visible sign | Mud tubes on foundation walls, slab edges, or interior walls | Kick-out holes and frass (pellet-like droppings) pushed out through tiny exit holes |
| Peak season | February–May | May–August |
Why this matters when you call: describing whether you saw swarmers during the day or at night, and whether you found mud tubes versus tiny kick-out holes with pellet debris, helps the licensed operator you’re matched with bring the right inspection tools and treatment approach on the first visit.
Florida’s Climate Is Built for Both Swarm Types
| Measure | Value | Source |
|---|---|---|
| Average low temperature, coldest month (January) | Approximately 50°F | NOAA climate-normal data for Lakeland, FL |
| Average high temperature, warmest month (July) | Approximately 93°F | NOAA climate-normal data for Lakeland, FL |
| Average annual precipitation | Approximately 55 inches, with a distinct rainy season June–August | NOAA climate-normal data for Lakeland, FL |
| Highest average relative humidity | August, approximately 78% | NOAA climate-normal data for Lakeland, FL |
| Florida’s statewide mean humidity relevant to drywood pressure | Approximately 75% | UF/IFAS drywood termite research summary |
Drywood termites extract enough moisture from the wood itself and from atmospheric humidity to survive without soil contact — which is exactly why Florida’s statewide average humidity near 75% makes it especially hospitable to that species. Polk County’s summer rainy season (June through August) lines up with the tail end of the subterranean swarm window and the heart of the drywood swarm window, meaning the wettest months carry pressure from both termite types simultaneously.
Licensing: Who’s Allowed to Treat a Polk County Termite Problem
Florida regulates termite and wood-destroying organism (WDO) treatment at the state level. Every termite treatment performed in Polk County must be carried out by an operator holding an active license under FDACS’s Termite/WDO category — a framework FDACS also uses to run its own Formosan Termite Surveillance Program tracking the species’ spread statewide.
Source: Florida Department of Agriculture and Consumer Services – Formosan Termite Surveillance.
Frequently Asked Questions
When do termites swarm in Polk County, Florida?
Native subterranean termites swarm during the day, primarily February through May and peaking after the first warm spring rains. Drywood termites swarm at night on warm, humid evenings, primarily May through August. UF/IFAS entomologists identify March through June as the window when termite activity statewide is most visible.
What’s the difference between subterranean and drywood termites?
Subterranean termites live underground and travel into a structure through mud tubes, swarming during the day. Drywood termites live entirely inside the wood they eat, leave kick-out holes and frass pellets rather than mud tubes, and swarm at night toward lights.
When do invasive Formosan and Asian subterranean termites swarm in Florida?
UF/IFAS tracking shows the invasive Asian subterranean termite beginning large swarms in South Florida in early March, with the Formosan subterranean termite typically starting dispersal flights in late April to early May.
Why is Florida so hospitable to drywood termites specifically?
Florida’s statewide average humidity near 75% lets drywood termites draw enough moisture from the air and the wood itself to sustain a colony without any soil contact — a key reason UF/IFAS research points to for the state’s heavy drywood pressure.
Who is legally allowed to treat termites in Polk County?
Only operators holding an active Florida license under FDACS’s Termite/WDO category can legally perform termite treatment in Polk County.
What should I look for and describe when I call about a possible termite problem?
Note whether you saw swarmers during the day or at night, and look for mud tubes (subterranean) versus tiny kick-out holes with pellet-like droppings (drywood) — that detail helps the licensed operator bring the right approach on the first visit.
Seeing termite swarmers, mud tubes, or frass around your Polk County home?Tap to call — get connected with an FDACS-licensed termite operator near you. No cost to you, no obligation to book.Sources & Further Reading
- UF/IFAS Fort Lauderdale Research and Education Center – Termites in Florida
- UF/IFAS – Termite Swarming Events (seasonal swarm chart)
- UF/IFAS News – As Florida Enters Termite Swarm Season (March 2021)
- UF/IFAS Pest Alert – Termites Swarming in Florida
- FDACS – Formosan Termite Surveillance Program
- FDACS – Consumer Information on Drywood Termites (PDF)
- NOAA NCEI – U.S. Climate Normals
Related Polk County Resources
About this reference
This page compiles publicly available data from the University of Florida Institute of Food and Agricultural Sciences, the Florida Department of Agriculture and Consumer Services, and NOAA climate-normal data. It is a data reference, not a pest-control diagnosis for any specific property. Compiled July 2026; source pages are linked directly above so figures can be independently verified.
Disclosure: Lakeland Exterminators (lakelandexterminators.com) is a free referral and dispatch service. We are not a licensed pest control company and do not directly provide pest control services. All work is performed by independent, FDACS-licensed and insured third-party pest control operators in your area. Calls placed through this site may be connected with a participating provider, who may contact you regarding your request. Same-day, emergency, and 24/7 availability are not guaranteed and depend on provider schedules, location, and demand. Service availability, pricing, licensing, and final response times are determined solely by the providers.