Orange County has no true termite off-season — but there are predictable peaks. Here's when swarms happen, what to watch for, and when to schedule an inspection.
"When is termite season?" is a common Orange County question, and the honest answer has two parts. Thanks to OC's mild coastal climate, termites are active year-round — there's no real off-season here the way colder regions have. But there *are* predictable peaks in the most visible sign of termites: swarming. Knowing the rhythm helps you know when to watch and when to schedule.
Year-Round Activity, Seasonal Swarms
Termite colonies in Orange County feed and grow all year — the marine-layer humidity and moderate temperatures don't shut them down in winter. What's seasonal is swarming: the period when mature colonies release winged reproductives (swarmers) to start new colonies. That's when termites become visible, so "termite season" in most people's experience really means "swarm season."
The Orange County Swarm Calendar
| Period | What tends to happen |
|---|---|
| Spring – early summer | Peak drywood swarming, especially after warm, sunny days |
| After first rains (fall) | Subterranean swarms often follow rain events |
| Summer heat | Activity continues, but extreme heat can push it deeper into wood, so surface signs may be less obvious |
| Winter | Quieter for swarming, but colonies remain active year-round |
Drywood termites — the dominant concern across OC — tend to swarm in the warm months, often on calm, warm afternoons. Subterranean swarms are more tied to moisture and frequently follow the first rains. Our broader posts on termite season in Southern California and the 2026 swarm season cover the regional picture.
What to Watch For During a Swarm
The signs of a swarm are the clearest termite evidence you'll get:
- Winged insects near windows, doors, and lights (drawn to light)
- Piles of discarded wings on sills and floors — swarmers shed them after flying
- Swarmers indoors, which usually means a colony inside the structure, not just nearby
If you see a swarm, don't reach for bug spray — killing the swarmers you see does nothing to the colony, as we covered in I sprayed termite swarmers with Raid. And if you're not sure whether what you're seeing is termites or flying ants, our color guide helps.
When to Schedule an Inspection
Because colonies are active year-round, the best time to inspect isn't really seasonal — it's *before* problems compound. That said, late winter to early spring is a smart window: it lets you find and treat existing colonies before the spring swarm adds new ones. And if you ever see a swarm, schedule promptly regardless of the calendar — a swarm means an established colony is nearby or inside.
The Bottom Line
Orange County termites are a year-round reality with spring-to-early-summer swarm peaks (and post-rain subterranean swarms). Watch for winged insects and discarded wings, don't rely on the calendar to keep you safe, and get an annual inspection to catch activity that never takes a season off. A free inspection is the simplest way to stay ahead of it.