Drywood Termite Swarming Season: What Southern California Homeowners Must Look For

Why Autumn Triggers Massive Termite Swarms in Inland Valleys

Every year between August and November, Southern California experiences peak drywood termite swarming (Incisitermes minor). Once ambient temperatures cross 80°F following warm, calm days, mature colonies release winged reproductives (alates) to establish new colonies.

Inland communities like Temecula, Murrieta, and Fallbrook face particularly high swarming pressure due to extended hot dry spells and widespread exterior architectural timber.

3 Critical Swarm Indicators Inside Your Home

Swarmers are clumsy fliers attracted to light. Homeowners frequently spot the evidence before ever seeing a live termite:

• Discarded Wings: Piles of shed translucent wings of identical length collecting on window sills, sliding door tracks, and sinks.
• Fecal Pellets (Frass): Small, 6-sided hexagonal sand-like pellets kicked out of tiny exit pinholes along eaves, baseboards, or ceiling joints.
• Hollow Sounding Lumber: Tapping structural eaves, rafter tails, or door jambs produces a dry, papery sound indicating internal excavation.

Localized Precision Borates vs. Whole-House Fumigation

Spotting swarmers does not necessarily mean your home must be tented. If the infestation is isolated to accessible roof eaves or garage framing, Knockout utilizes high-pressure localized borate foam injections.

Borates penetrate deep into wood fibers, permanently poisoning the cellulose against future digestion without displacing your family.