Every October I have the same conversation about South Florida mosquito service. The rain is letting up, the dry season is starting, can we pause until spring. For years I have argued against that on biology alone. This year I do not have to, because there is a forecast on the table.
What the forecast says
NOAA released its U.S. winter outlook on October 15, 2026, covering December 2026 through February 2027. It favors wetter-than-average conditions across the southern United States, from California to Florida, and along the Eastern Seaboard (Source: NOAA winter outlook news release, noaa.gov, Oct 15, 2026). The driver is El Nino. The Climate Prediction Center's October 8 discussion keeps an El Nino Advisory in place and expects the event to reach strong to very strong levels by January through March 2027 (Source: NOAA Climate Prediction Center ENSO Diagnostic Discussion, cpc.ncep.noaa.gov, Oct 8, 2026).
A wetter than normal December through February is not how our winters usually run. The dry season is the stretch when standing water disappears on its own and most yards stop producing mosquitoes without anyone lifting a finger. Take that away and the seasonal stand-down that works most years does not work this one.
People who run mosquito control districts in this state are already saying so. Covering the dengue outbreak on October 7, WLRN quoted Pasco County Mosquito Control District director Adriane Rogers: "If we do have an excessively wet winter, that is going to continue to allow mosquito production" (Source: WLRN via WUSF, Oct 7, 2026). The same piece states the normal rule plainly, that the end of the rainy season and the arrival of cooler, drier weather typically signals the end of mosquito season (Source: same article).
The case curve is not pointing down either
Florida's arbovirus surveillance report for October 4 through 10 puts 2026 at 368 locally acquired dengue cases from eight counties, with 72 of those reported in that single week (Source: Florida Arbovirus Surveillance Week 40, floridahealth.gov, Oct 4-10, 2026).
The number I keep going back to in that report is the onset breakdown: 21 cases with onset in July, 159 in August, 188 in September (Source: same report). September ran ahead of August. Whatever this outbreak was doing heading into October, winding down was not it.
Our three counties from the same county table: Broward 1, Palm Beach 1, Miami-Dade 9, out of 368 statewide. Hillsborough has 310. Tampa Bay is the outbreak and South Florida is the footnote, and I am not going to dress that up to sell a plan.
On status, as of October 10 Broward and Palm Beach are under a mosquito-borne illness advisory and Miami-Dade is under a mosquito-borne illness alert, which is the higher of the two tiers (Source: same report).
The number that connects the forecast to your yard
The same report counts 288 travel-associated dengue cases statewide for 2026, with Miami-Dade at 182, Broward at 20 and Palm Beach at 13 (Source: Week 40 report).
Travel-associated means the person was infected somewhere else and flew home with it. That is not local transmission and the two categories should never be added together. But each of those is virus arriving in a county that is full of Aedes aegypti, and the winter travel season is ahead of us, not behind us.
So the dry season question mostly answers itself. In a normal year the weather does part of the work for you from November through April. The forecast says do not bank on that this year, and the mosquito that matters here breeds in containers on your own property rather than out in the canal.
What we actually do about it
Two products doing two different jobs. The In2Care station is a natural-based larval control approach that uses the mosquito itself to carry product back into the water where it breeds. The barrier treatment is a different thing and it is not natural. It kills adult mosquitoes on contact and holds 10 to 17 days of residual, applied as the label directs, with no neonicotinoids.
Then the free part, which matters more in a wet winter than a dry one. Walk the property once a week and dump anything holding water: plant saucers, bromeliad cups, tarp folds, clogged gutters, the tray under the AC condenser, the boat cover, kids toys. A bottle cap of water is enough for this species.
If you want a walkthrough before the holidays, call the office and we will set one up.
Sources are cited inline. Questions about your own property? Call 561-443-3333 or request a free quote.