Centipedes are nocturnal, coming out primarily after dark to hunt for insects and other small prey. During the day, they stay hidden in damp, sheltered spots. Seasonally, you’re most likely to see them indoors during spring and summer, when warmer temperatures and higher humidity drive their activity and reproduction.
Time of Day: Why You See Them at Night
Centipedes are almost exclusively active after sunset. Their bodies lack the waxy outer coating that most insects have, which means they lose moisture quickly when exposed to dry, open air. Darkness brings cooler temperatures and higher humidity, both of which help centipedes stay hydrated while they hunt. This is why you’ll typically spot one darting across a bathroom floor or basement wall late in the evening or during the middle of the night.
During daylight hours, centipedes retreat to tight, moist hiding spots. Indoors, that means cracks in basement walls, spaces behind stored boxes, underneath sinks, inside floor drains, or behind baseboards. Outdoors, they tuck themselves under rocks, leaf litter, bark, and decaying wood. Any location that holds moisture and blocks light is a potential daytime shelter. If you’re seeing centipedes during the day, it usually signals either a large population or an environmental disturbance like construction, cleaning, or flooding that forced them out of hiding.
Seasonal Peaks: Spring Through Late Summer
Centipede sightings indoors spike during spring and summer. According to University of Minnesota Extension, centipedes move indoors during warm weather and are rarely seen in winter. Warmer soil temperatures wake up outdoor populations, and as they become more active, some inevitably wander inside through foundation cracks, gaps around doors, and utility openings.
Spring is also breeding season. In temperate parts of North America, females deposit eggs during spring and summer in hidden, moist locations like under soil or inside decaying organic matter. A single female can lay 10 to 60 eggs at a time, and those eggs hatch after one to three months. That means a spring egg-laying event produces a wave of young centipedes by midsummer, which partly explains why sightings tend to climb as summer progresses.
In tropical or subtropical climates, centipedes breed year-round, so there’s no true “off season” for sightings. But in most of the U.S. and Canada, activity drops sharply once temperatures fall in autumn. House centipedes, the species most commonly found indoors, cannot survive winters outdoors in colder states. Those already inside a heated home, however, can remain active year-round, which is why you might occasionally see one in January in a warm basement.
What Brings Them Inside
Moisture is the single biggest draw. Centipedes follow humidity the way ants follow sugar. Basements, crawl spaces, bathrooms, and laundry rooms all create the damp conditions centipedes need to survive. A home with poor drainage, leaky pipes, or condensation problems is far more attractive to centipedes than a dry one.
Food availability matters too. Centipedes are predators. They eat spiders, silverfish, cockroach nymphs, ants, and other small insects. If your home already has a population of these prey species, centipedes have a reason to stay. Solving a centipede problem often means solving a broader pest problem at the same time.
Weather events can also trigger sudden appearances. Heavy rain saturates soil and floods outdoor hiding spots, pushing centipedes toward drier shelter, which often means your foundation walls. Prolonged dry spells have a similar effect, driving moisture-seeking centipedes indoors. Either extreme can produce a noticeable uptick in sightings over just a few days.
How Long They Stick Around
Centipedes are not short-lived pests. Some species survive as long as six years. Young centipedes go through multiple molts before reaching adulthood, gaining new leg pairs with each shed. Many North American species actually hatch with fewer legs than they’ll have as adults, adding segments as they grow. This slow development means a centipede you see in your basement could have been living there for months or even years.
A single female house centipede can produce up to 150 offspring over her lifetime. In a heated indoor environment with steady moisture and prey, populations can sustain themselves through winter without any new centipedes entering from outside. That’s why occasional sightings in cold months don’t necessarily mean centipedes are “coming in.” They may have never left.
Reducing Centipede Activity in Your Home
Because centipedes depend on humidity, lowering indoor moisture levels is the most effective long-term strategy. Keeping indoor humidity between 45 and 50 percent makes your home significantly less hospitable. A dehumidifier in the basement or crawl space can achieve this. The EPA recommends keeping indoor humidity below 60 percent as a general guideline, but centipedes and similar moisture-loving pests start thinning out well before that threshold.
Fix leaking pipes, improve ventilation in bathrooms and laundry areas, and make sure your home’s grading directs rainwater away from the foundation. Seal cracks and gaps where utilities enter the home, and check weatherstripping around basement windows and doors. Removing leaf litter, mulch, and firewood stacked directly against exterior walls eliminates the outdoor hiding spots that serve as staging areas before centipedes move inside.
Addressing the prey population also helps. If you’re seeing silverfish, roaches, or spiders regularly, centipedes have a reliable food source. Sticky traps placed along baseboards in basements and bathrooms can help you gauge both the centipede population and the prey species sustaining it. Once the food supply drops, centipedes have far less reason to stay.