Most people associate pest problems with summer heat and rainy season — and for good reason. But Southwest Florida's dry season brings its own set of pest challenges that catch many homeowners off guard. When temperatures drop and rainfall decreases from November through May, two pests in particular become a serious problem: rodents and spiders.
Why Dry Season Drives Pests Indoors
During dry season, the outdoor environment becomes less hospitable for many pests. Food sources diminish, ground cover dries out, and cooler overnight temperatures push wildlife and insects to seek warmer, more sheltered conditions. For homes in Naples, Marco Island, Ave Maria, and Bonita Springs, that shelter is often your attic, your walls, or your garage.
Roof rats are particularly notorious for this seasonal migration — and they're one of the most common rodents in Collier County. Understanding their behavior can help you protect your home before an infestation establishes itself.
Roof Rats: Southwest Florida's Most Common Rodent Problem
Roof rats — also called black rats or fruit rats — are the dominant rodent species in coastal Southwest Florida. Unlike Norway rats which burrow in the ground, roof rats are agile climbers that live in trees, palm fronds, and attics. They're most active at night and often go undetected until the infestation is already significant.
How they get in
Roof rats can squeeze through a hole the size of a quarter. Common entry points include gaps around roofline vents, deteriorating fascia boards, uncapped pipes, and gaps where utility lines enter the home. Once inside an attic, they nest in insulation, chew through electrical wiring, and contaminate the space with droppings.
Scratching or scurrying sounds in the attic or ceiling — especially at night. Droppings that are dark, shiny, and banana-shaped (about ½ inch long). Chew marks on wood, wiring, or stored items in the attic or garage. Citrus fruit on trees with hollowed-out rinds — roof rats love fruit.
Why bait stations are the right approach
Bait stations placed around the perimeter of your home intercept rodents before they get inside. A minimum of 4 stations for smaller homes, up to 8 or more for larger properties, provides a protective ring that keeps populations in check. Serviced bi-monthly, the stations are kept clean, the bait is fresh, and any activity is caught early. If rodents do make it past the stations, trapping in the attic, home, and lanai is included — so the problem gets addressed at every level.
Spiders: Why Your Pool Screen Gets Worse in Dry Season
If you have a pool screen enclosure in Naples or Marco Island, you've probably noticed that spider webs seem to appear overnight — and dry season is when it gets worst. Several spider species common to Southwest Florida become more active and more visible during the cooler, drier months.
The most common culprit is the cellar spider (often called a daddy longlegs), which rapidly colonizes pool screen enclosures and builds webs in corners, along frames, and across screening. While not dangerous, they create an ongoing maintenance headache and make your outdoor space feel uninviting.
A fogging treatment applied to the pool screen enclosure and surrounding bushes eliminates the active population and creates a residual effect that slows re-infestation significantly. Bi-monthly treatments keep screens consistently clean between visits.
Other Dry Season Pests to Watch For
Wasps and Hornets
Dry season is prime time for wasp and hornet nest building around eaves, soffits, and outdoor structures. Paper wasps are particularly common in Southwest Florida and will build nests under any horizontal surface that offers protection from rain. Check your eaves and overhangs regularly from October onward.
German Roaches
While roach activity is highest in rainy season, German roaches are a year-round problem in Florida's climate. During dry season they tend to cluster closer to moisture sources — under sinks, near dishwashers, and in bathroom vanities. A preventative barrier spray applied bi-monthly keeps them from establishing indoors.
How to Prepare Your Home for Dry Season
- Inspect your roofline, fascia, and attic vents for gaps before November
- Install or repair screens over attic vents and crawl space openings
- Store firewood at least 20 feet from the home and off the ground
- Trim palm trees and branches away from the roofline
- Clear out garage clutter that provides nesting areas for rodents
- Schedule a bi-monthly rodent service before peak season begins
The best time to start a rodent service is before you have a problem. By the time you hear scratching in the attic, a family of roof rats has likely been living there for weeks. Proactive bait station service is significantly less expensive and disruptive than dealing with an active infestation.
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