Eric holds a degree in Pest Control Technology from the University of Florida and carries all five Florida pest control license categories: General Household Pest, Rodent, Lawn & Ornamental, Wood Destroying Organisms, and Public Health (License JB313837). He personally developed Mosquito Shield's proprietary Mosquito Protection Blend and has been treating South Florida properties for over a decade. When he is not in the field, he is behind every piece of content on this site.
If you live anywhere in South Florida, you know the answer already feels like "always." But mosquito pressure does follow predictable patterns tied to temperature, rainfall, and species biology. As someone who holds a Public Health pest control license and has been treating South Florida properties for over a decade, I can tell you: knowing the seasonal cycle helps you stay protected instead of reactive.
South Florida Mosquito Season Month by Month
The mildest period. Activity slows significantly below 60°F but does not stop. Warm winter days (high 70s) can still produce biting activity. No-see-ums (biting midges) often remain active even in cooler months.
Populations begin building as temperatures consistently exceed 70°F. This is when dormant Aedes eggs from last season begin hatching. The delayed hatch can cause a sudden sharp increase after the first significant spring rains.
A significant jump in activity. Pre-rainy season humidity is high and standing water from irrigation keeps breeding sites active. This is when homeowners start calling — but ideally you’re already protected from a March or April start.
The worst months. Daily afternoon thunderstorms deposit standing water across properties. Temperatures in the upper 80s to 90s allow mosquitoes to complete their full life cycle in 7–10 days. Canal, lake, and Everglades-adjacent properties see the most intense pressure.
Still very active. Rainfall begins declining but temperatures remain warm through October. This is the second-worst window of the year. Do not drop your guard in September — population counts often remain near summer highs well into October.
Activity decreases noticeably as temperatures begin dropping below 70°F at night. Still active enough to warrant protection, especially during warm fronts. Canal-front properties remain problematic through November.
Mosquito activity reaches its lowest point. Cold fronts push temperatures below 60°F, slowing mosquito development. However, South Florida winters are unpredictable — a warm December can surprise you.
The Species Behind South Florida’s Mosquito Problem
Understanding which species are active in Broward and Palm Beach Counties explains a lot about why South Florida mosquito pressure is unlike most of the country. The three primary species we deal with are:
The primary concern for dengue, Zika, and chikungunya transmission. Prefers small, man-made containers for breeding — saucers, gutters, tarps, anything that holds water for a few days. Bites during daylight, not just at dusk. Highly urbanized; thrives in residential neighborhoods.
Recognizable by its black and white striping. Also a daytime biter, active from sunrise to sunset. Breeds in small containers and natural depressions. Very aggressive — multiple bites per encounter. Can transmit dengue and chikungunya. Increasingly dominant across South Florida.
The primary vector for West Nile virus in South Florida. Breeds in stagnant, organically rich water — ditches, neglected pools, sewage-contaminated areas. Primarily bites at dusk and dawn. Populations peak in late summer and remain active well into fall.
Why South Florida Is Different From the Rest of the Country
Most mosquito control advice written for the general US market does not apply to South Florida. Here is what makes our region unique:
- No hard winter kill. In northern states, freezing temperatures kill most mosquito adults. In South Florida, populations simply slow down and resume with the first warm spell.
- Year-round breeding water. Canals, lakes, retention ponds, and daily irrigation keep breeding sites active through every season.
- 7–10 day life cycle in summer heat. At 90°F, mosquitoes complete their life cycle in under 10 days. Monthly treatments are useless against this cycle — which is why we spray weekly or biweekly.
- High disease pressure. West Nile, dengue, and Eastern Equine Encephalitis are all actively detected in Broward and Palm Beach Counties. This is not just a nuisance issue.
- Aedes species dominate. These are container breeders that thrive in residential neighborhoods, not just swamps. They don’t care how tidy your yard is.
What to Do Before Peak Season Hits
Start professional treatments in March or April. By treatment 3–4 (6–8 weeks in), most properties see 80%+ mosquito reduction. Waiting until June means playing catch-up during the worst months of the year.
Eliminate standing water before the rainy season. Clean gutters, empty saucers under potted plants, flip over anything that collects rainwater, and fill low spots in your lawn.
Don’t wait to see mosquitoes. By the time you notice a problem in South Florida, you’re already behind the population curve. The delayed hatch means populations can spike faster than you can respond reactively.
Frequently Asked Questions About South Florida Mosquito Season
Don’t Wait for Peak Season
Mosquito Shield treats weekly or biweekly with an all-natural, bee-safe formula. Rain-resistant. No contracts. 5.0 stars · 55 Google reviews. Serving Boca Raton, Fort Lauderdale, and 28+ South Florida communities.