Termite Swarm Season in Monterey County: What to Look For

What a Swarm Actually Means

Termites produce winged reproductives — called alates — only when a colony has reached maturity and is ready to expand. A drywood termite colony typically takes 4–7 years to produce its first swarm. A subterranean colony can swarm in 3–5 years. Seeing swarmers doesn't mean you have an active infestation starting today; it means one has been present long enough to generate reproductives. The swarmers themselves are weak fliers and die within hours without finding a mate. The threat isn't the swarmers — it's the established colony that produced them.

Termite Swarmers vs. Flying Ants: How to Tell Them Apart

This is the single most common question we get during spring swarm calls. The visual differences are clear once you know what to look for:

• Wings: Termite swarmers have two pairs of equal-length wings that extend well past the body. Flying ants have a larger front pair and smaller rear pair, with wings roughly body-length.
• Waist: Termites have a straight, tube-like body with no waist constriction. Ants have a distinct pinched waist — the characteristic "ant waist."
• Antennae: Termite antennae are straight and beaded. Ant antennae are elbowed — bent at a sharp angle.
• Shed wings: Both termites and ants shed wings after mating. A pile of equal-length wings near a window sill or threshold is a strong indicator of termites.

Drywood vs. Subterranean: Different Swarms, Different Problems

Monterey County has both species, and they swarm differently:

• Drywood termites (Incisitermes species): Swarm in late summer and early fall in most of California, but Monterey County's mild coastal climate produces swarms as early as March–April on warm days. Look for emergence from wood surfaces — windowsills, door frames, attic beams. Drywood colonies live entirely within the wood; no soil contact required.
• Subterranean termites (Reticulitermes hesperus): Swarm in late winter and spring, typically on warm, sunny days following rain — often January through April. Swarmers emerge from the soil or from mud tubes on the foundation. They require soil contact and moisture to survive.
• Dampwood termites (Zootermopsis species): More common in Santa Cruz County but present in moisture-affected structures throughout coastal Monterey County. Swarm in late summer. If you're seeing large, dark swarmers (up to 1 inch), suspect dampwood.

Where to Look After a Swarm

After observing a swarm, inspect these specific locations before calling:

• Window sills and near light sources — swarmers fly toward light. Piles of shed wings here are a reliable sign.
• Attic — the primary harborage for drywood termite colonies in older Monterey County homes. Look for fecal pellets (tiny, 6-sided wood-colored cylinders) in corners and on horizontal surfaces.
• Foundation perimeter — for subterranean termites, look for mud tubes running up the concrete foundation, crawl space piers, or sill plates.
• Under sinks and around plumbing — moisture-affected wood attracts both subterranean and dampwood species.

The Coastal Monterey County Termite Reality

Monterey County has among the highest drywood termite activity rates in California. The reasons are specific: the mild year-round temperatures allow colony activity 12 months a year; the fog belt provides the humidity that softens wood and accelerates termite entry; and the housing stock — a significant proportion of homes in Monterey city, Pacific Grove, Carmel, and the older Salinas neighborhoods were built before 1960 using old-growth fir and redwood framing that termites can exploit for decades. A Victorian-era home in the Presidio neighborhood of Monterey that has never had a termite inspection has almost certainly had some drywood activity. The question is extent, not presence.

What Happens at a Termite Inspection

A California-licensed structural pest inspector examines all accessible areas of the structure — attic, crawl space, garage, subarea, and exterior — and issues a WDO (Wood Destroying Organism) report. The report classifies findings into Section 1 (active infestation or damage requiring immediate treatment) and Section 2 (conditions conducive to future infestation). The inspection takes 1–2 hours for an average home. The WDO report is the standard document required for real estate transactions in California and is valid for 90 days from inspection date.