Why Bed Bugs Love Summertime and How to Keep Them Out

Bed bugs love summertime for two reasons: warm rooms speed up how fast they feed, breed and grow, and summer travel gives them more chances to ride home in a suitcase. Put the two together and a single hitchhiker picked up on vacation can turn into a real infestation within a couple of months.

In South Florida, bed bugs never really take a season off, because they live indoors where the temperature suits them all year. What summer adds is movement: vacations, cruises, college students coming home, visiting relatives and more furniture changing hands. This guide explains what the research says about bed bug seasons, why heat matters, and the habits that keep summer travel from ending with bites at home.

Are Bed Bugs Really Worse in Summer?

Yes, at least in the reports. When University of Pennsylvania epidemiologists mapped calls to Philadelphia’s public health pest control service, they found what the senior author called “a steep and significant seasonal cycle” in bed bug reports. According to Penn Today, infestations peaked in August and reached their low in February.

The researchers offered several possible explanations rather than a single cause:

• Bed bugs likely move around more in warm months, spreading to neighboring rooms and homes.
• Development and reproduction probably speed up in warmer weather.
• Longer-distance spread happens when the bugs ride on people and their belongings.

That pattern comes from a northern city with cold winters. In South Florida the seasonal swing in indoor temperature is much smaller, but the summer jump in travel and visitors is just as real.

How Heat Speeds Up the Bed Bug Life Cycle

Bed bugs are cold-blooded, so the temperature of the room sets the pace of their life. Virginia Cooperative Extension’s bed bug biology guide gives a clear picture of how fast things move when a room is warm.

A female lays about 1 to 7 eggs a day for roughly 10 days after a single blood meal, and around 140 eggs in her lifetime. Bed bugs typically feed every 3 to 7 days. Because a mated female stores sperm, one female carried home in a bag can start an infestation on her own.

Every nymph must take a blood meal before it molts to the next of its five stages, and adults need blood to keep laying eggs. Warm temperatures mean more frequent feeding, which is exactly what “more active in summer” looks like from your side of the mattress.

Why Air Conditioning Does Not Protect You

Most South Florida homes are kept in the 70s year-round. That is comfortable for people and close to ideal for bed bugs, which develop best above 70°F but below 90°F, according to the same guide. Turning the thermostat down a few degrees will not stop them, and neither will turning it up: the EPA notes that raising the thermostat or running space heaters does not get a room hot enough to kill them.

How Summer Travel Brings Bed Bugs Home

Bed bugs do not fly or jump, and UF/IFAS notes that they cannot cling to hair, fur or feathers. They travel the way people do: in luggage, clothing, bedding and furniture. Summer multiplies those trips.

• Vacations and cruises put your bags in hotel rooms and cabins that hundreds of other travelers have used.
• College students coming home bring back bedding, laundry and furniture from dorms and shared apartments.
• Houseguests arrive with suitcases that spent the previous night somewhere else.
• Moves and summer sales move secondhand mattresses, couches and headboards from home to home.

The EPA says experts link the rise in U.S. bed bug infestations to more travel, lack of knowledge about prevention, pesticide resistance and ineffective control. For a deeper look at packing and hotel habits, read our tips for traveling without getting bed bugs.

Why South Florida Has No Bed Bug Off-Season

In cold climates, unheated cabins and dorms can slow bed bugs down in winter. Here, homes, condos and hotels stay warm, so populations keep growing all year. Our article on why bed bugs thrive in South Florida’s climate covers the local conditions in detail.

One summer myth is worth clearing up: leaving the house empty while you travel does not starve bed bugs. Virginia Cooperative Extension reports that starved bed bugs at room temperature survive about 70 days on average, most likely dying from dehydration rather than hunger. Older European studies recorded survival of over a year, but the guide notes those results may reflect very cold conditions (below about 40°F), which do not apply to a Miami bedroom. A two- or three-week trip leaves them hungry, not dead.

How to Avoid Bringing Bed Bugs Home This Summer

Prevention is much easier than treatment. These steps build on the EPA’s travel tips and its guidance on protecting your home.

At the Hotel or Rental

1. Inspect before you unpack. Use your phone’s flashlight to check the mattress seams, the headboard and the luggage rack.
2. Keep bags off the bed and floor. Use the luggage rack for packing and unpacking, and keep suitcases away from the bed.
3. Report signs to the front desk right away and ask for a different room.

When You Get Home

1. Unpack straight into the washing machine, then dry on high heat. The EPA notes that washing alone generally does not kill bed bugs; the dryer does the work.
2. Inspect the empty suitcase carefully, especially seams, zippers and pockets.
3. Store luggage outside the bedroom, such as in the garage. The EPA’s advice is blunt: never store suitcases under your bed.
4. Vacuum the area where you unpacked to pick up any bugs that came along for the ride.

A Note on Heat Tricks

The EPA says bed bugs die when their body temperature reaches 113°F, and that the container or room must get even hotter so the heat reaches every hiding spot. A sealed black bag left in the sun can work for small items only if the contents actually get that hot. A parked car is not a reliable substitute.

Guests, Used Furniture and Shared Laundry

Travel is not the only summer route. The EPA recommends a few habits that close the other doors:

• Check secondhand furniture, beds and couches for signs of bed bugs before they come inside.
• Use mattress and box spring encasements. Light-colored, durable covers remove many hiding spots and make bugs easier to see; check them for holes.
• Bag your laundry when you use shared machines, and move items from the dryer straight into a clean bag.
• Reduce clutter so there are fewer places to hide.
• In apartments and condos, install door sweeps and seal cracks around baseboards and outlets to slow movement between units.

If you do have bed bugs, do not put the mattress on the curb with a “free” sign. The EPA advises destroying or slashing infested furniture you throw out so nobody else takes it home. In most cases you should not throw things away at all: most belongings can be treated and kept.

Signs You Brought Bed Bugs Home

Bed bugs hide by day and feed at night, so you are more likely to find their traces than the bugs themselves. Watch for:

• Itchy bites after sleeping, often on the face, neck or arms
• Rust-colored or dark spots on sheets, the mattress or the headboard
• Shed skins and tiny pearl-white eggs in mattress seams
• Flat, reddish-brown bugs about the size of an apple seed
• A foul odor from the bugs’ oily secretions in heavily infested rooms (UF/IFAS)

Bed bugs also tuck into places people rarely check. Our list of unusual bed bug hiding places and our guide to detecting bed bugs before it is too late show where to look.

The EPA considers bed bugs a public health pest, but they are not known to transmit or spread disease. The bites can still itch intensely and cost you sleep. See a doctor if bites become very swollen, look infected or trigger a strong reaction. For a detailed look at the bed bug itself, visit our bed bug pest library.

When to Call a Bed Bug Professional

Bed bugs are hard to eliminate on your own because they hide in seams, cracks and furniture joints, and their eggs resist many control methods. Our article on bed bug myths vs. facts explains why quick fixes usually disappoint.

Call a professional if you find live bugs, eggs or shed skins, or if bites keep appearing after travel. Toro’s bed bug control service starts with a free inspection to confirm whether you really have bed bugs and to rule out look-alikes such as fleas. You get a clear plan and quote, including which rooms need treatment and how to prepare, and the treatment is backed by Toro’s 110% Satisfaction Guarantee: if the bugs come back, so will Toro, at no additional cost to you.

Summer brings plenty of other pests too. For the rest of the season’s list, see the most common summer pests in Florida.

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Frequently Asked Questions

Educational content. This article is for general information about pests in South Florida and is not medical, legal or professional advice. If you have a bite, sting or allergic reaction, contact your doctor; in an emergency, call 911. Pest problems vary from home to home, so a licensed professional should inspect before treatment. When using any pesticide, always read and follow the product label.

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