When Is Termite Swarming Season in DFW?
Termite swarming season in DFW runs from about February through May. Native termites fly on warm spring days, most often right after rain. Formosan termites take over at the end of the season, with nighttime flights from late May into June. A single swarm often lasts only minutes, which is why many homeowners see the wings left behind instead of the termites.
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When Termite Season Starts in Texas
Swarm season moves north across Texas with the spring warm-up. Texas A&M's native subterranean termite page tracks the season by region. South Texas sees the first swarms in January and February, and the Panhandle waits until April and May. DFW sits between the two, so most swarms here land in late winter and spring.
Across the whole state, Texas A&M's termite FAQ puts the most common swarm months at February through May. A warm, wet spring can start the season early, and a cold, dry one can push the first swarms into April.
Termite Swarming Season in DFW, Month by Month
Different termites swarm at different times, and the time of day changes too. This table shows what's swarming in DFW through the year and what usually sets it off.
| Months | What's swarming in DFW | Time of day | What sets it off |
|---|---|---|---|
| January | Early swarms in South Texas, rarely in DFW | Daytime | An unusual warm spell |
| February and March | The first native subterranean swarms | Daytime, often in the afternoon | Several warm days, then rain |
| April and May | Peak native swarms | Daytime | Warm, humid days after a rain |
| Late May and June | Formosan termites, where they're present | After dark, toward lights | Warm, humid nights |
| July to December | Few swarms outdoors | Varies | Swarms are uncommon |
| Pest | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Native subterranean termites | not active | some activity | high activity | peak | peak | some activity | not active | not active | not active | not active | not active | not active |
| Formosan termites | not active | not active | not active | not active | some activity | peak | not active | not active | not active | not active | not active | not active |
Native termites swarm by day, often after rain. Formosan termites swarm after dark and only where colonies are already present.
Formosan termites are still uncommon here, even though Texas A&M has found them in four DFW-area counties. Native subterranean termites produce nearly all the swarms DFW homeowners see.
What Triggers a Termite Swarm
Weather sets the date. University of Georgia entomologists note that several days of above-average temperatures followed by a light rain will trigger a swarm. Moist, soft soil makes it easier for the swarmers that survive to dig in and start a new colony.
The colony sets the size. Only a mature colony sends out swarmers, and it releases hundreds or thousands at once on the same day. Neighboring colonies often swarm on the same afternoon, because they're all responding to the same weather.
How Long a Termite Swarm Lasts
The swarm itself is short. UGA's guide to termite swarming season says it often lasts only minutes. You might see a cloud of winged termites around a window or a porch light, then find nothing but wings an hour later.
The swarmers don't last long either. Once they land, they drop their wings and look for a mate and a patch of moist soil. Swarmers trapped inside a house can't reach soil, so they dry out and die, usually within about a day.
The colony that sent them is a different story. It stays put, and it will swarm again next season if nothing treats it.
Why Swarm Season Is Inspection Season
A swarm is the one moment a hidden colony shows itself. Workers feed inside wood and soil all year, but swarmers fly into the open, so spring is when many DFW homeowners first learn they have termites. A swarm inside the house usually means the colony is already in the structure.
That makes swarm season a good time for a termite inspection for DFW homes, even if you only found wings. When termites are active, Sentricon termite protection uses bait stations that the colony's own workers feed on and share. Quarterly pest control customers also get routine termite checks as part of their service. Around our Southlake office, swarm-season visits start with a termite inspection in Southlake.
Termite Swarm Season FAQ
Do termites swarm every year?
An established colony usually does. Once a colony is mature, it sends out new swarmers each spring until something treats it or it runs out of food and moisture.
Are termites less active after swarm season?
No. Swarming is just the visible part of the year. The workers keep feeding underground and inside wood through summer, fall and the mild DFW winter.
Does a swarm outside mean termites are in my house?
Not necessarily. Texas soil holds termites in most yards, so an outdoor swarm tells you a colony lives nearby. It's a good reason to check your slab edge for mud tubes and watch your windowsills next spring.
If swarmers showed up at your house this spring, get a quote online or by phone before next season, and we'll check where they came from.
