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The Eastern subterranean termite is the dominant species across Dallas-Fort Worth, and it swarms from February through May, typically in the daytime after a warm rain once soil temperatures climb above 70Β°F. That usually lands in mid-March to early April here. Because North Texas winters rarely freeze the soil deep enough to slow termites down, colonies stay active close to year-round, swarm season is just when they become visible.
Formosan termites, a faster-reproducing and more aggressive subterranean species, have also spread into parts of Texas over the past few decades, though Texas A&M AgriLife's entomology program notes their concentration is still heaviest around Houston-Galveston and the Gulf Coast rather than North Texas specifically. Worth knowing about, but the Eastern subterranean termite is the one actually driving most of what we see and treat in DFW.


