Why Are There So Many Cockroaches in My House This Summer?

You keep the kitchen clean, take out the trash, and still spot a cockroach under the sink. Then another shows up by the back door, in the garage, or in the bathroom.

If cockroaches seem to show up out of nowhere once summer settles into Hampton Roads, there’s a reason for it. Getem Services hears from homeowners every year as roach activity increases across Virginia Beach, Norfolk, Chesapeake, Portsmouth, Suffolk, Newport News, Hampton, and surrounding Tidewater communities.

Summer heat, humidity, and heavy rain can all make cockroach activity more noticeable around Hampton Roads homes. Depending on the species, roaches may move in from outside, come up from moisture-prone areas, or spread indoors once they find food, water, and shelter.

Here’s why cockroach activity spikes in summer, which species may be showing up, where they’re likely hiding, and what to do when they keep coming back.

Summer Heat Changes Where Cockroaches Want to Be

Cockroaches are active year-round in Virginia, but summer changes where they spend their time.

When temperatures climb into the 90s and pavement radiates heat well into the evening, the places where roaches normally hide outside can become less comfortable. Mulch beds, storm drains, damp soil, trash areas, crawl space openings, and gaps around foundations may still provide cover, but extended heat can dry out some of those areas or push roaches toward cooler, wetter spots.

Houses often check both boxes.

Large roaches, including American and Oriental cockroaches, often move in from outside, crawl spaces, drains, or other moisture-prone areas when summer conditions shift. Smaller German cockroaches are a different concern because they can breed indoors and spread quickly through kitchens, bathrooms, laundry rooms, and other areas with warmth, food, and water.

That is why identifying the type of cockroach is important. A large roach near the garage after heavy rain may call for a different approach than small roaches infesting the bathroom or kitchen.

What Kind of Cockroaches Show Up in Hampton Roads Homes?

Not every cockroach problem is the same. In Hampton Roads, summer roach activity can involve American, Oriental, and German cockroaches. Each one tells you something different about where the problem may be coming from.

American cockroaches are the large, reddish-brown roaches people often call “water bugs.” They are common around drains, crawl spaces, sewers, utility areas, garages, and damp exterior areas. These roaches often wander indoors during summer when heat, heavy rain, or moisture changes make the structure more attractive than their outdoor hiding spots.

Oriental cockroaches are also strongly tied to moisture. They are dark brown to black, slower-moving roaches that often show up around damp crawl spaces, floor drains, basements, garages, utility areas, and spots with decaying organic matter. Like American cockroaches, they may move indoors when outdoor hiding spots become too wet, too hot, or overcrowded.

German cockroaches are different. These are the smaller tan roaches with two dark stripes behind the head, and they are most often found in kitchens, bathrooms, laundry rooms, and other areas with food, water, warmth, and shelter. If you are seeing small roaches in the bathroom or kitchen, especially more than once, the issue may be German cockroaches rather than large roaches wandering in from outside.

What Hampton Roads Summer Weather Does to Roach Activity

Hampton Roads summers are not just hot. They are humid, stormy, and damp for long stretches. That combination can make cockroach activity much more noticeable around homes.

High humidity keeps them active.

Cockroaches need moisture to survive. In dry conditions, they usually stay closer to damp hiding places. When humidity stays high, they can stay active longer and move farther from their usual shelter.

That is one reason homeowners may start seeing roaches near patios, garages, crawl space doors, exterior walls, kitchens, bathrooms, laundry rooms, and drains during the summer. Moisture in and around the home gives them more opportunity to move and survive.

Afternoon storms flood their hiding spots.

Heavy rain can saturate the ground and fill cracks, drains, voids, and other outdoor harborage areas where roaches hide. When those spaces flood, roaches have to relocate.

In Hampton Roads homes, that can mean roaches move toward the foundation, into garages, through gaps around pipes, up through drains, or into the crawl space. After a good rainstorm, homeowners often notice increased activity indoors or near entry points.

Warmer temperatures speed up breeding.

Warm weather also helps cockroach populations grow faster. American and Oriental cockroach activity can increase around damp outdoor areas, crawl spaces, drains, and utility zones. German cockroaches can reproduce quickly indoors when they have access to food, moisture, and shelter.

The species, location, and frequency of sightings all matter, which is why summer cockroach problems should not all be treated the same way.

Crawl Spaces Often Contribute to the Roach Problem

A lot of Hampton Roads homes have vented crawl spaces, and those spaces can play a big role in summer pest problems.

During the summer, warm, humid air enters through crawl space vents and meets cooler surfaces under the home. That can create condensation and damp conditions. For cockroaches, that is ideal. Crawl spaces offer darkness, moisture, shelter, and access to plumbing, insulation, foundation gaps, and floor penetrations.

This is especially attractive to large moisture-loving roaches. If a crawl space smells damp or musty, moisture may be building up underneath the home. That moisture can attract roaches and other pests, and it may also make it easier for them to survive close to the living space.

Getem Services offers crawl space moisture control solutions, including encapsulation and dehumidifier installation, to help dry out the space and reduce the conditions that allow cockroaches and other pests to thrive underneath the home.

Where Cockroaches Hide During the Day

Most homeowners see cockroaches at night because they avoid light and spend the day tucked into tight, protected spaces.

In summer, our technicians commonly find cockroach activity in areas with moisture, warmth, food debris, or easy access from outside. That may include:

• Under kitchen appliances, especially behind refrigerators and dishwashers, where it’s warm and crumbs can collect

• Bathroom cabinets and areas around toilet bases where moisture lingers

• Laundry rooms near washer drains, utility sinks, and dryer vents

• Around water heaters, HVAC closets, and utility areas

• Inside wall voids near plumbing penetrations

• Garages near pet food, recycling bins, trash cans, or cardboard boxes

• Crawl spaces, foundation gaps, and areas near exterior doors

Why Store-Bought Sprays Don’t Solve Cockroach Problems

It is tempting to grab a can of spray when you see one of these bugs run across the floor. The problem is that most store-bought products only kill the roaches you see.

They do not address where roaches are coming from or where they are hiding. Some products can also push cockroaches deeper into wall voids, cabinets, crawl spaces, or other protected areas, where the DIY treatment cannot reach.

The other issue is that cockroaches can survive on a surprising amount of material. Grease, crumbs, soap residue, cardboard glue, hair, pet food, and even dead insects can all give them something to feed on. Even a clean home can still have enough moisture and shelter to support cockroach activity if entry points and hiding spots are not addressed.

That is why a year-round pest control plan is more effective than only treating the roaches you happen to see. A good plan focuses on the exterior perimeter, moisture-prone areas, entry points, and the conditions that allow roaches to keep moving toward the home.

Signs the Problem Is Bigger Than One Roach

Seeing one large cockroach does not always mean you have a major infestation, especially in summer when American or Oriental cockroaches may wander inside from outdoors. But ongoing sightings are worth taking seriously.

Other warning signs of a more serious problem include pepper-like droppings under sinks or in cabinets, a musty odor near moisture-prone areas, shed skins, and dark, ridged egg capsules.

Small roaches in the kitchen or bathroom should also be addressed quickly. German cockroaches reproduce fast, hide well, and are much harder to control once they spread behind cabinets, appliances, and wall voids.

How Getem Services Handles Summer Cockroach Problems

Local, family-owned Getem Services has been helping Hampton Roads homeowners with cockroach problems since 1922. When you reach out for help getting rid of cockroaches, we start with an inspection inside and outside your home — including the crawl space if you have one — to figure out where cockroaches are getting in and where they're concentrated.

From there, we treat the active infestation and apply an exterior perimeter treatment to help reduce new cockroach activity around the home.

If you are dealing with German cockroaches — the small, tan roaches with two dark stripes that often show up in kitchens and bathrooms — those require a more targeted treatment. German cockroaches reproduce quickly indoors, so they usually need a more intensive approach than occasional large roaches moving in from outdoors.

For ongoing protection against cockroaches and other household pests, we recommend signing up for our quarterly home pest control plan. Each visit includes exterior treatment, spider web and wasp nest removal, and interior treatment when needed between regular visits. If rodent bait stations were installed during the initial service, we'll check those each time we come out, too.

Schedule Cockroach Control in Hampton Roads

Don’t keep chasing cockroaches with store-bought sprays. Getem Services provides residential pest control for Hampton Roads homeowners, including treatment for cockroaches and other common household pests.

Fill out the form or call today to request a free quote.

This blog was originally published on September 1, 2023, and has been updated with new information about summer cockroach activity in Hampton Roads.