Yes, earwigs stay active through San Diego winters, just at a lower level than the summer peak. Most pest guides written for colder climates say earwigs disappear or go dormant once it turns cold, but San Diego rarely gets cold enough to force that. Our earwigs slow down, they don’t shut down.
Why the “earwigs disappear in winter” advice doesn’t apply here
European earwigs, the species behind nearly every earwig sighting in San Diego, slow their activity when temperatures drop into the 30s and 40s for extended stretches, the kind of cold that forces true winter dormancy in much of the country. San Diego’s winter lows typically stay well above that range, especially in coastal and central neighborhoods, so the trigger that shuts earwigs down elsewhere just doesn’t show up here in any sustained way.
What does change is moisture and daylight. Shorter days and the season’s rain bring more consistent dampness to mulch beds, under flowerpots, and in irrigation boxes, which is exactly the cover earwigs prefer. Some homeowners actually notice more earwigs after a winter rain than they did during a dry summer stretch, since the damp conditions pull them out from deeper hiding spots.
What earwig activity actually looks like in a San Diego winter
Expect fewer earwigs overall than the late spring and summer peak, but not a total disappearance. They’ll still be found under mulch, in damp planter saucers, behind loose bark, and occasionally working their way into a garage or laundry room through a gap under a door, especially after a stretch of rain drives them out of saturated soil.
Coastal neighborhoods, which already deal with marine layer humidity most mornings, tend to see the least seasonal drop-off, since the moisture that earwigs need is already a near-constant. Inland and East County properties see a bigger swing between summer highs and winter lows, since drier inland air combined with less irrigation in cooler months takes away some of the cover, but irrigated garden beds and mulch still hold enough dampness to keep a population going.
Why this matters for prevention timing
Because San Diego earwigs never fully go dormant, winter isn’t a season to stop paying attention. It’s actually a reasonable time to get ahead of the spring buildup, since populations that survive the winter at low numbers are the ones that expand fastest once the weather warms and moisture stays high into spring. Clearing damp mulch away from foundation lines, fixing any irrigation overspray that keeps a bed constantly wet, and sealing gaps under exterior doors during the slower winter months means less to deal with when activity ramps back up.
Are winter earwigs any different from summer ones?
Behaviorally, no. It’s the same species, same pincers (called cerci, mostly for defense and mating rather than any real threat to people), and the same nocturnal habit of hiding during the day and foraging on decaying plant matter, aphids, and other small insects at night. The only real difference is population size, since a mild winter with less breeding activity means fewer earwigs than the summer months produce, not a different insect or a different risk level.
When it’s worth calling a professional in winter
A handful of earwigs under a flowerpot or in a mulch bed during winter is normal and rarely needs anything beyond basic yard cleanup. It’s worth a professional visit if earwigs are consistently making their way indoors regardless of season, if numbers stay high even through the drier winter stretches (a sign of a moisture problem worth investigating separately), or if what looks like earwig activity is actually clustering somewhere unusual, like inside wall voids or under baseboards. Our general pest control service covers a seasonal perimeter treatment that holds up through San Diego’s mild winters without needing constant re-application. Our full guide to earwigs in San Diego covers identification and control in more depth if you’re not certain earwigs are actually what you’re finding, and our San Diego pest season calendar breaks down what to expect from other pests month by month.
Frequently asked questions
Do earwigs die off in San Diego winters?
No, not the way they do in colder climates. San Diego’s winter lows rarely get cold enough to force earwigs into true dormancy, so populations slow down but don’t disappear. Expect fewer sightings than the summer peak, not zero.
Why am I seeing more earwigs after winter rain?
Rain increases moisture in mulch, soil, and garden beds, which is exactly the damp cover earwigs need. A wet stretch can actually push more of them out from deeper hiding spots or into new areas of the yard, which is why sightings sometimes spike right after rain rather than dropping.
Is winter a good time to earwig-proof my house?
Yes. Since populations are naturally lower, winter is a practical window to clear damp mulch away from the foundation, fix overspray from irrigation, and seal gaps under exterior doors before the spring buildup starts. Less work now generally means less activity to manage later.
Do earwigs bite or sting people?
Earwigs can pinch with their cerci if handled or trapped against skin, but they rarely break skin and carry no venom. It’s an uncomfortable pinch, not a health risk, and most people never get pinched at all since earwigs are far more likely to retreat than confront anything as large as a person.
If earwigs are showing up indoors this winter regardless of the season, or garden bed activity isn’t slowing down at all, call (858) 400-6561 for an inspection.