The same 170 mph design value applies countywide, from the Gulf shore at Marco Island to the agricultural inland at Immokalee. We have written wind load reports against that target since the firm started in Naples in 2002.
Calculating wind loads since 2002, online since 2006.
Collier's basic wind speed is 170 mph for Risk Category II buildings, written into Florida Building Code R301.2(7). Collier County Growth Management, the City of Naples, and the City of Marco Island all apply it without amendment.
That value covers single-family homes, the golf-community villas in places like Pelican Bay and Lely Resort, and most commercial structures permitted from US 41 east to State Road 29.
Unlike Broward and Miami-Dade, Collier is not a High-Velocity Hurricane Zone county.
HVHZ status is reserved for the southeast corner of the peninsula by FBC Section 1620, so the missile-impact protocols (TAS 201/202/203) and Miami-Dade NOA requirement do not apply here.
What Collier does inherit is the FBC R301.2(7) wind speed table. It sets the same 170 mph design value but routes product approval through standard Florida Product Approval listings rather than the HVHZ subset.
This 170 mph value is the foundational input for ASCE 7-22 Equation 26.10-1, where it gets squared and combined with Kz, Kzt, Kd, Ke, and the appropriate pressure coefficients. It enters fixed; everything else is a per-project judgment.
Pre-filled to Naples (34102). Type any Collier ZIP or switch the risk category. The result appears below with the FBC R301.2(7) citation your plan reviewer looks for on the cover sheet.
Risk Cat IV (essential facilities) jumps to 190 mph — ten mph higher than Broward's Risk Cat IV value, even though both counties share the 170 mph Risk Cat II number.
That reflects the steeper consequence-of-failure premium the Collier table builds into hospitals, EOCs, and shelters.
The 170 mph value covers every populated ZIP inside county limits, from beachfront Marco Island to the inland farming communities around Ave Maria and Immokalee. Outlying ZIPs in eastern Collier (Big Cypress, Ochopee, Everglades City) also resolve to 170 mph.
| City | Primary ZIP | Wind Speed (Cat II) | Typical Setting | Reference |
|---|---|---|---|---|
| Naples (downtown) | 34102 | 170 mph | Coastal · Gulf exposure | FBC R301.2(7) |
| Marco Island | 34145 | 170 mph | Barrier island · Gulf exposure | FBC R301.2(7) |
| Immokalee | 34142 | 170 mph | Inland agricultural (~35 mi) | FBC R301.2(7) |
| Golden Gate | 34116 | 170 mph | Inland suburban (~8 mi) | FBC R301.2(7) |
| Ave Maria | 34142 | 170 mph | Inland planned community | FBC R301.2(7) |
Hurricane Irma (September 10, 2017) made its second Florida landfall on Marco Island as a Category 3 storm, with the eye coming ashore around 3:35 PM EDT. The eyewall passed over Naples within ninety minutes.
The Naples Municipal Airport anemometer recorded a 142 mph gust before the instrument failed. Reconstruction analyses placed sustained winds in the 110-115 mph range along the Naples coast, with gusts to 145 mph in the strongest squall lines.
Post-Irma surveys produced a striking pattern. Homes permitted after the 2002 FBC adoption — designed to the 170 mph target — held envelope integrity, while pre-1994 housing stock saw widespread roof and gable failures.
Hurricane Ian (September 28, 2022) made its primary Cat 4 landfall at Cayo Costa in Lee County, north of Collier. But its expansive southern eyewall scraped the Naples coast and pushed a record 7.26 ft surge into Naples Bay.
Sustained winds at Marco Island peaked near 100 mph with gusts to 130 mph.
Ian validated the design speed differently than Irma: it was the surge, not the wind, that caused most structural loss in Naples. Post-2002 buildings above the BFE again came through the wind loading intact.
Hurricane Wilma (October 2005) crossed from Cape Romano into Collier as a strong Cat 2 before exiting the east coast.
Hurricane Donna (September 1960) made landfall just south of Naples as a Cat 4 with 145 mph sustained winds — the storm that put southwest Florida on the modern hurricane map.
Building permits in Collier come from one of three offices. Collier County Growth Management Division covers unincorporated land — most of East Naples, Golden Gate Estates, Immokalee, and Ave Maria.
The City of Naples Building Department covers everything inside Naples city limits, and the City of Marco Island Building Services covers the island and Goodland. Everglades City operates its own building official, though volume there is small.
All four authorities currently enforce the Florida Building Code 8th Edition (2023), which references ASCE 7-22 and incorporates R301.2(7) verbatim. There are no Collier-specific amendments that change the 170 mph design value.
What varies is paperwork. Naples requires its own elevation certificate form for coastal properties in the AE and VE flood zones, and Marco Island has a separate seawall and dune permitting process administered through the city engineer.
Local product approval follows the standard Florida Product Approval (FL#) listings published by the DBPR.
Submissions should include FL# for every window, exterior door, garage door, and roof covering assembly, with cut sheets showing design pressures meet the demands from the 170 mph value.
Basic wind speed: 170 mph Risk Cat II (FBC R301.2(7))
HVHZ status: Not HVHZ — standard Florida Product Approval applies
Code edition: Florida Building Code 8th Edition (2023), ASCE 7-22 by reference
Permitting authorities: Collier Growth Management, City of Naples, City of Marco Island, Everglades City
Product approval: FL# listings via DBPR
This page settles the wind speed. The next decision is exposure, mean roof height, topography, and the pressure coefficients that turn 170 mph into the pounds-per-square-foot a plan reviewer wants to see.
The Collier wind load calculator runs that ASCE 7-22 math for you and produces an Engineering Report with every coefficient cited to its section. PE sign-and-seal is available nationwide through our licensed network.
For wind speeds in other Florida counties, return to the Florida wind speed hub.
Florida Building Code R301.2(7) hardcodes 170 mph as Collier's Risk Category II basic wind speed because Collier sits inside the southwest Florida hurricane corridor.
Historical landfalls (Donna 1960, Wilma 2005, Irma 2017) repeatedly pushed Cat 3-plus winds across the entire county.
The FBC value supersedes the ASCE 7-22 map for every permit issued by Collier Growth Management.
Naples experienced a sustained Cat 3 eyewall on the evening of September 10, 2017, with peak gusts measured at 142 mph at Naples Municipal Airport before the anemometer failed.
Marco Island recorded the landfall, with reconstruction analyses placing peak gusts at 130-145 mph inland of the eye.
The FBC 170 mph design value performed as intended: post-2002 construction designed to that target saw radically lower structural failure rates than older buildings.
No. Marco Island sits inside Collier County and uses the same 170 mph Risk Category II value as Naples, Bonita Bay, Pelican Marsh, Ave Maria, and Immokalee.
What changes between the island and the mainland is exposure.
Most of Marco Island faces an unobstructed Gulf fetch and qualifies as Exposure D for west-facing components, while Naples subdivisions inland of US 41 often qualify as Exposure B or C.
Yes. Collier's 170 mph applies countywide, so Immokalee (~35 miles inland) carries the same basic wind speed as Naples Beach.
The FBC override was specifically written to remove inland/coastal arguments at permit review.
The exposure category will almost always be different — Immokalee's agricultural setting reads as Exposure C, while coastal Naples runs C or D — but the V value entering ASCE 7-22 Equation 26.10-1 is identical.
Collier County Growth Management Division currently enforces the Florida Building Code 8th Edition (2023), which adopts ASCE 7-22 by reference and incorporates the R301.2(7) jurisdictional wind speed table.
The City of Naples and the City of Marco Island operate their own building divisions but apply the same code edition without additional amendment.
So a project crossing municipal boundaries inside the county uses the same 170 mph value throughout.
Hometown number, hometown calculator. Created in Naples, Florida — one of the very first wind load calculators on the web, with an in-house FL-licensed P.E. reviewing jurisdictional overrides.