Termite Swarm Season in Texas & Oklahoma: When It Starts and What to Do

Every spring, millions of homeowners across Texas and Oklahoma witness a phenomenon that triggers immediate concern: termite swarms. Thousands of winged insects suddenly appear around windows, light fixtures, or exterior walls — and if they're termites, it means a mature colony is living nearby.

Here's everything you need to know about termite swarm season in our service areas.

When Is Termite Swarm Season?

Texas

• Subterranean termites: February through May (peak: March–April)
• Formosan termites: May through June (primarily Houston, Beaumont, and coastal areas)
• Drywood termites: September through November (less common, coastal regions)

Oklahoma

• Subterranean termites: March through June (peak: April–May)
• Formosan termites are less common in Oklahoma but have been found in the southern part of the state

Louisiana & Mississippi

• Subterranean termites: February through April
• Formosan termites: May through June — Louisiana has the highest Formosan termite pressure in the continental U.S.

Trigger conditions: Swarms typically occur after a warm rain when temperatures reach 70°F+. A warm, humid day following rain in March or April is prime swarming weather.

Are Those Flying Ants or Termite Swarmers?

This is the most common question we get during swarm season. Here's how to tell them apart:

Feature	Termite Swarmer	Flying Ant
Wings	Equal length, twice body length	Unequal — front wings longer
Body	Straight, thick waist	Pinched, narrow waist
Antennae	Straight, beaded	Elbowed, bent
Color	Dark brown to black	Dark brown, reddish, or black
Shed Wings	Yes — piles near windowsills	Less commonly shed

Key identifier: If you find piles of shed wings — all the same size — near windows or doors, you're almost certainly looking at termite swarmers.

What Does a Swarm Mean for Your Home?

Swarm Inside Your Home

If winged termites are emerging inside your home — from walls, ceilings, window frames, or floor cracks — this means a mature colony is living in or under your home. Colonies produce swarmers after 3–5 years, which means termites have been active for years.

This requires immediate professional inspection.

Swarm Outside Your Home

Outdoor swarms near your home mean a colony exists nearby — possibly in a tree stump, woodpile, or neighbor's property. While not as immediately concerning, it means termites are in your area and your home could be their next target.

This is a good time to schedule a preventive inspection.

What to Do During a Termite Swarm

1. Don't spray them — insect spray kills the visible swarmers but does nothing to the colony. It also makes identification harder for inspectors.
2. Collect a sample — capture a few swarmers (alive or dead) in a zip-lock bag for identification.
3. Note the location — where exactly are they emerging from? This helps inspectors find the colony.
4. Vacuum up the swarm — a vacuum cleaner is the easiest cleanup method. Swarmers are harmless — they don't bite or cause damage.
5. Call a professional — schedule an inspection as soon as possible, ideally within 24–48 hours.

Swarm Season Checklist for Homeowners

Before and during swarm season, take these preventive steps:

• ✅ Inspect your foundation for mud tubes — check every side of your home
• ✅ Check moisture around your foundation — fix leaky faucets, clogged gutters, and poor drainage
• ✅ Move firewood and lumber away from your home (at least 20 feet)
• ✅ Remove dead tree stumps from your yard
• ✅ Ensure mulch doesn't contact your foundation wood (maintain a 6-inch gap)
• ✅ Check window and door frames for signs of termite activity
• ✅ Schedule a professional inspection before swarm season starts

Don't wait for a swarm to find out if your home is at risk. Romex Pest Control offers FREE termite inspections across Texas, Oklahoma, Louisiana, and Mississippi — no swarm required.