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When do termites swarm

Native subterranean termites swarm in spring, often in daylight after rain. Colonies feed all year. Gulf Formosan termites fly at dusk from April through June, with a peak in early to mid May.

Indoor wings mean a colony already in or under the house. Killing the fliers does not stop the workers. Typical US ID check, not a WDO inspection.

Key takeaways

  • Native subterranean: daytime, spring, often after rain. Bag one insect before you vacuum.
  • Formosan in the Gulf: dusk, April through June, porch lights. Yellowish brown.
  • Wings on an indoor sill usually mean the house. A swarm off a stump in the yard does not.
  • Swarmers do not chew the wood. Workers do. A spray on the pile is not treatment.
  • Confirm the waist and the wings, then book a wood inspection, not a hardware-store foam.

The flight is short. The colony already spent the winter in the wood or the soil.

Daylight after rain, or dusk at the porch light

NC State: subterranean swarmers usually fly in the daytime, frequently in spring, often after rain. The colony is active all year. Outdoor fliers often came from a stump, landscape timber, or wood on soil in the yard. Indoor fliers usually mean an infestation in or under the building.

LSU AgCenter: Formosan subterranean termites in Louisiana swarm as early as April through June, peaking in early to mid May, around Mother’s Day. They fly at dusk on warm, humid, still evenings. Native Louisiana subterranean termites swarm in the day. Formosan swarmers are yellowish brown and pile up at lights. A few that rode in through a vent are common. A cloud flying indoors, or a large pile of wings inside, is the house.

This is not a 50-state calendar. Gulf and Deep South clocks run earlier. Cooler markets run later. Drywood flights are a different insect and a different month. If you only have a date, still confirm the insect.

Bag one. Then vacuum.

NC State: swarmers do not cause the structural damage. Workers do. Killing the fliers clears the nuisance. It does not treat the colony. Save a few insects or wings in a clear bag. Equal-length wings are the termite tell. Pinched waist and longer front wings are ants. That three-check lives on flying ants vs termites.

Kentucky: winged termites coming out inside a house almost always warrant a licensed look. They live about a day. Vacuum after you bag. The soil colony is still there. A swarm off a stump in the yard does not, by itself, mean the house is infested. Walk the foundation for tubes after that. Signs of termites.

LSU: if you are in Formosan country, turn off outdoor lights at night in May and June so you do not pull more fliers to the eaves. Pull wood and cardboard off the soil. Keep mulch back from the foundation. Fix leaks. That is delay control, not a soil treatment.

Log the date, the room, and a photo next to a coin in the sighting log before the pile is gone. Book a written look: termite inspection cost. Treatment is a second paper on termite treatment cost. What to do this week is on how to get rid of termites. Month-by-month checks live on the seasonal pest calendar. Contact for a referral path. Typical US ranges, not a bid.