"We have a concrete block home. Termites cannot get into concrete."
Florida’s climate supports a large and diverse spider population year-round. Warm temperatures, high humidity, abundant insect prey, and dense landscaping create ideal conditions for spiders to establish, reproduce, and thrive in and around residential properties.
The University of Florida/IFAS Entomology Department documents over 50 spider species commonly found in Florida, many of which are active in residential areas across Palm Beach County and the Treasure Coast year-round. Unlike northern states where cold winters reduce populations significantly, South Florida spiders never fully slow down.
More spiders in the environment means more incidental contact with humans. Most encounters are harmless. But a basic understanding of which species live here makes it easier to respond appropriately when you find one.
The southern black widow is the most medically significant spider in South Florida and one of the most recognizable. UF/IFAS describes the southern black widow as shiny black with a distinctive red hourglass marking on the underside of the abdomen, with females being significantly larger and more venomous than males. Black widows prefer dark, undisturbed areas. Garages, woodpiles, storage sheds, the undersides of outdoor furniture, and cluttered storage areas are all common locations. They are not aggressive and bites typically occur when the spider is accidentally contacted or trapped. The American Association of Poison Control Centers identifies black widow venom as a neurotoxin capable of causing intense pain, muscle cramps, sweating, nausea, and in severe cases difficulty breathing. Medical attention should be sought promptly following a confirmed or suspected black widow bite.
The brown widow is an invasive species that has become widely established across South Florida. UF/IFAS confirms the brown widow has spread significantly across Florida over the past two decades and is now one of the most commonly encountered venomous spiders in residential areas. Brown widows are tan to brown in color with an orange or yellow hourglass marking. They produce distinctive spiky egg sacs that are easy to identify once you know what to look for. They favor the same sheltered, undisturbed harborage sites as black widows and are increasingly common in residential landscaping, outdoor furniture, and garage clutter throughout Palm Beach County and the Treasure Coast.
The brown recluse is frequently cited by South Florida residents but is far less common here than most people believe. UF/IFAS clarifies that true brown recluse populations are not established in Florida and that most suspected cases in the state involve other species. Confirmed brown recluse bites in Florida are rare. That said, brown recluses can be transported into Florida in boxes, furniture, and stored goods from infested states. If you have recently moved from a state where brown recluses are common, inspection of stored materials is reasonable. If you believe you have been bitten, seek medical attention and bring the spider for identification if possible.
This is the large, yellow-legged spider that builds enormous webs in wooded areas, along fence lines, and in garden spaces across South Florida. Its size — females can reach several inches in leg span — startles most people who encounter it for the first time. UF/IFAS confirms the golden silk orb-weaver is harmless to humans and actually beneficial, consuming large numbers of pest insects including mosquitoes, flies, and beetles. There is no reason to fear it.
The spiny orb-weaver is one of the most distinctive spiders in Florida — a small, white or yellow crab-shaped spider with colored spines extending from its abdomen. It is commonly found in gardens and landscaping throughout South Florida. UF/IFAS Extension confirms the spiny orb-weaver is completely harmless and one of the most commonly encountered garden spiders in the state.
Cellar spiders — sometimes called daddy long-legs — are thin-bodied spiders with extremely long, delicate legs commonly found in corners, attics, and garages. UF/IFAS Extension notes that cellar spiders actually prey on other spiders, including black widows, when they share the same habitat. The persistent myth that cellar spiders are dangerously venomous is false.
The southern house spider is a large, brown, fast-moving spider frequently encountered indoors. Males are often mistaken for brown recluses due to their size and coloring. UF/IFAS confirms the southern house spider is not medically significant and presents no meaningful risk to humans despite its alarming appearance.
Spiders follow their food. If your home has an active insect population — drawn in by lighting, gaps in screens, or poor perimeter sealing — spiders will follow.
UF/IFAS Extension notes that reducing interior and exterior insect populations is the most effective long-term spider management strategy for Florida homes. Clutter in garages, attics, and storage areas creates ideal harborage for both harmless and venomous species. Dense ground-level landscaping planted close to the foundation gives spiders direct access to your home’s exterior.
Reduce outdoor lighting near entry points or switch to yellow bug lights. White and blue-spectrum lighting attracts insects, which attracts spiders.
Keep garages, attics, and storage areas organized. Cardboard boxes on the floor and cluttered corners are ideal harborage for black and brown widows specifically.
Seal gaps around windows, doors, pipes, and utility penetrations. The EPA recommends sealing cracks and crevices as one of the most effective ways to prevent spiders from entering your home.
Shake out shoes, gloves, and stored clothing before putting them on, particularly items stored in garages or outdoor spaces for extended periods.
Schedule regular perimeter treatments. Professional pest control that targets the insect population around your home is the most effective way to reduce spider pressure long-term.
At Wise House Pest Control, we serve homeowners across Palm Beach County and the Treasure Coast with perimeter and interior treatments that address the full pest picture, not just the spiders you see. If you are concerned about what is sharing your home, call us for a free inspection.
1177 Hypoluxo Rd Suite C-31 Lantana, FL 33462 (561) 727-8239
464 NW Peacock Blvd, Unit 106 Port St Lucie, FL 34986 (772) 783-4300
University of Florida/IFAS: Spiders in Florida
University of Florida/IFAS: Southern Black Widow
University of Florida/IFAS: Brown Widow Spider
University of Florida/IFAS: Brown Recluse Spider
University of Florida/IFAS: Golden Silk Orb-Weaver
University of Florida/IFAS: Southern House Spider
University of Florida/IFAS Extension: Common Spiders in and Around Homes
American Association of Poison Control Centers: Spider Bites
U.S. Environmental Protection Agency: Spiders
