Year-round Average winter low about 42.8°F, so pests stay active (NOAA normals)Formosan termites Swarm at night around lights in late spring (NATS)Fire ants Bait the yard, then treat mounds (USDA APHIS)Roaches German roaches usually need bait and follow-up, not a single spray (UC IPM)Bed bugs They travel in luggage and used furniture (EPA)Rodents Seal entry gaps, trap, then clean up (CDC)Pest companies: rent or own this local guide. Month-to-month, no contract.Year-round Average winter low about 42.8°F, so pests stay active (NOAA normals)Formosan termites Swarm at night around lights in late spring (NATS)Fire ants Bait the yard, then treat mounds (USDA APHIS)Roaches German roaches usually need bait and follow-up, not a single spray (UC IPM)Bed bugs They travel in luggage and used furniture (EPA)Rodents Seal entry gaps, trap, then clean up (CDC)Pest companies: rent or own this local guide. Month-to-month, no contract.

Termites in San Antonio

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Termite damage in wood. Photo: bonmoovo / Depositphotos.

San Antonio's main termite threat is the native subterranean termite. The eastern subterranean termite is the most common termite in North America; colonies range from about 20,000 to 5 million workers. Native subterranean swarmers are dark, fly in daylight, and usually start swarming in February or March. The invasive Formosan termite is also found in Texas, where its swarm season is late May to early June, at night around lights.

What treatment involves

An inspection for mud tubes, damaged wood and swarmers.
Liquid soil termiticide around the foundation, or a bait-station system.
Fixing moisture problems that draw termites.

Buying or selling a home? Ask for a wood-destroying insect (WDI) inspection.

Sources: North American Termite Survey: swarm seasons · UF/IFAS: Formosan subterranean termite

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