Termite Swarming Season in Brazos Valley: Signs, Timing, and What to Do

Every spring in College Station, something happens that most homeowners either miss entirely or don’t fully understand: termites swarm. It usually happens fast — on a warm afternoon after a stretch of rain — and within a few hours the swarmers are gone. What’s left behind is either a new colony getting established in or around your home, or confirmation that a colony has been quietly building for years underground.

Termite swarming season in College Station is not a minor seasonal event. Texas has some of the highest subterranean termite pressure in the entire country, and Brazos County’s warm, moist soil conditions are practically ideal for colony growth. This guide walks you through exactly when swarming happens here, what signs to look for, and the steps you need to take the moment you spot activity — because with termites, timing is everything.

What Is Termite Swarming — and Why Does It Happen?

Termite swarmers — also called alates or reproductives — are winged termites that leave an established colony in large numbers to mate and start new colonies. Swarming is a sign that a termite colony nearby has grown large and mature enough to reproduce. That typically means the original colony has been active for at least three to five years.

Swarmers are not the termites doing damage to your home. They don’t eat wood. Their only job is to fly, find a mate, shed their wings, and start a new colony. The danger is what seeing them tells you about what’s already happening underground — and how close that activity is to your structure.

When Is Termite Swarming Season in College Station, TX?

In the Brazos Valley, subterranean termite swarming season typically runs from February through May, with peak activity falling in March and April. The exact timing each year is driven by three environmental conditions lining up together:

• Soil temperatures consistently reaching around 70°F or warmer
• A significant rain event that saturates the soil
• A warm, calm, sunny afternoon following that rainfall

When those three conditions align, swarms can appear within hours. They typically last 30 to 60 minutes and then disperse. Because swarms are so brief, many homeowners miss them outdoors entirely — only noticing the shed wings left behind on windowsills or along baseboards.

Formosan termites — a more aggressive species documented in parts of Texas — tend to swarm slightly later, from April through June, and often in the evening around dusk near outdoor lighting.

Signs of Termite Swarming Activity Around Your Property

Because swarms themselves are brief, the signs left behind are usually the first thing homeowners notice.

Discarded Wings

After mating, swarmers shed their wings immediately. You’ll find small, equal-length wings — often in small piles — on windowsills, along door frames, near exterior lighting, on patios, and sometimes inside near window tracks or baseboards.

Mud Tubes on Your Foundation

Subterranean termites travel above ground through mud tubes — pencil-width tunnels made of soil, wood particles, and termite saliva. Check your foundation, crawlspace walls, interior walls near the floor, and garage walls.

Wood That Sounds Hollow or Looks Bubbled

Termites eat wood from the inside out, so surface damage is often the last thing you see. Tap baseboards, door frames, and window sills with your knuckle. A hollow sound where solid wood should be is a warning sign.

Tight-Fitting Doors and Windows

As termites damage wood and produce moisture during feeding, door and window frames can begin to warp slightly. Doors or windows that suddenly feel harder to open or close may be an early sign of termite damage.

What to Do If You See Swarmers or Signs of Termite Activity

Step 1 — Don’t Panic, But Don’t Wait

Seeing swarmers doesn’t automatically mean your home is being consumed right now. But it does mean termite activity is close enough to your property that the colony is reproducing. The right move is to schedule a termite inspection as quickly as possible.

Step 2 — Document What You’re Seeing

Take photos of any swarmers, shed wings, mud tubes, or wood damage you find. Note exactly where in or around the home you found them.

Step 3 — Get a Professional Termite Inspection

A licensed termite inspector will examine your foundation, crawlspace, attic, interior walls, and any wood-to-soil contact points. They’ll confirm whether what you’re seeing is subterranean termites, Formosans, or something else entirely.

Step 4 — Choose the Right Treatment

Termite treatment is not one-size-fits-all. The two most common professional approaches in the Brazos Valley are liquid soil treatments and baiting systems. Many properties need a combination of both for the best long-term protection.

How to Make Your Home Less Attractive to Termites Year-Round

Treatment addresses an active problem. These preventive steps reduce the risk of termites establishing or returning to your property between professional visits:

• Keep mulch at least six inches away from your foundation
• Fix leaking pipes, faucets, and AC drainage immediately
• Ensure proper grading around your home so water drains away
• Remove wood debris, old stumps, and scrap lumber from your yard
• Store firewood off the ground and away from exterior walls
• Seal cracks and gaps in your foundation
• Schedule an annual termite inspection

Staying on a consistent termite protection plan is the most reliable defense. Early detection is the single biggest factor in limiting termite damage and expensive repair costs.