Hurricane Ian struck Cayo Costa in September 2022 as a high-end Cat 4, with eyewall winds of 145–155 mph across Sanibel, Captiva, and Fort Myers Beach. This page reports the ASCE 7-22 map value for every Lee ZIP.
Calculating wind loads since 2002, online since 2006.
Lee County's basic wind speed for Risk Category II buildings reads in the 160–165 mph contour band on ASCE 7-22 Figure 26.5-1. The exact value depends on which contour line the project falls between.
Coastal Sanibel and Fort Myers Beach sit in the higher part of the band. Inland Lehigh Acres lands lower as the contour grades north and east, away from the open Gulf fetch.
Unlike neighboring Collier County, which carries a verified 170 mph FBC override, Lee's status under Florida Building Code R301.2(7) is still being verified. The question is binary.
Either Lee publishes a county-specific jurisdictional wind speed that supersedes the ASCE map, or it does not. If it does not, the ASCE 7-22 map value is the enforceable design wind speed for permit submission.
Hurricane Ian made that question very visible. Post-Ian rebuilds drove scrutiny of whether existing design wind speeds capture the actual hazard, especially on the barrier islands.
The wind speed map itself has not changed since ASCE 7-22 adoption. What tightened is FEMA flood-zone remapping and Lee's post-Ian permit standards for how structures perform when wind and surge arrive together.
Cape Coral (33904) is the starting point — Lee's largest city, with the highest concentration of canal-front single-family homes in Florida. Type any Lee ZIP and the result re-computes.
The badge is brand blue today because no county-wide FBC R301.2(7) override is currently coded for Lee. If our verification surfaces one, the badge turns gold and the citation appears inline.
Population centers in Lee fall along three corridors: the Cape Coral / North Fort Myers grid, the central Fort Myers / Lehigh Acres band, and the southern Bonita Springs / Estero / Sanibel coastal arc.
Wind speed contour values are read from ASCE 7-22 Figure 26.5-1. The Reference column will gain an FBC override entry once verification is complete.
| City | Primary ZIP | Wind Speed (Cat II) | Typical Setting | Reference |
|---|---|---|---|---|
| Cape Coral | 33904 | ASCE map value (FBC override verification pending) | Waterfront grid · canal network | ASCE 7-22 Fig 26.5-1 |
| Fort Myers | 33901 | ASCE map value (FBC override verification pending) | Inland of Caloosahatchee | ASCE 7-22 Fig 26.5-1 |
| Bonita Springs | 34134 | ASCE map value (FBC override verification pending) | Southern Lee · coastal-adjacent | ASCE 7-22 Fig 26.5-1 |
| Estero | 33928 | ASCE map value (FBC override verification pending) | Inland between Bonita and Fort Myers | ASCE 7-22 Fig 26.5-1 |
| Sanibel | 33957 | ASCE map value (FBC override verification pending) | Barrier island · Gulf exposure | ASCE 7-22 Fig 26.5-1 |
| Lehigh Acres | 33936 | ASCE map value (FBC override verification pending) | Inland eastern Lee | ASCE 7-22 Fig 26.5-1 |
Hurricane Ian made landfall the morning of September 28, 2022 at Cayo Costa, a barrier island roughly 30 miles west of Fort Myers.
It came ashore as a Category 4 with maximum sustained winds of 150 mph and a minimum central pressure of 940 mb.
It was among the strongest hurricanes ever to strike the contiguous US. The eye crossed Pine Island and tracked east across Cape Coral and North Fort Myers before dissipating inland.
Sanibel Causeway collapsed at multiple points, severing road access to Sanibel and Captiva for weeks. Fort Myers Beach absorbed a 12–15 ft surge along Estero Boulevard that destroyed most ground-floor structures west of the highway.
Pine Island and Matlacha saw similar surge-plus-wind devastation. The reconstruction debate reshaped Lee County's interpretation of the National Flood Insurance Program substantial-damage rules.
Charley made landfall August 13, 2004 just north of Lee in Charlotte County's Punta Gorda as a compact, fast-moving Category 4 with 150 mph sustained winds.
Its eyewall raked northern Lee — Cape Coral and North Fort Myers — producing roof and gable failures on pre-1992 construction and validating the post-Andrew code revisions.
Where Ian's signature damage in Lee was surge, Charley's was pure wind. The comparison is the cleanest demonstration of how the post-2002 Florida Building Code performs against a major hurricane without flooding.
Before Charley and Ian, Lee absorbed Donna (1960) and a series of mid-century storms that shaped early local building practice. They remain part of why ASCE 7-22 places Lee in its contour band today.
Permits in Lee come from Lee County Community Development for unincorporated areas — most of the county, including Sanibel, North Fort Myers, San Carlos Park, and the rural east.
Cities run their own departments: Cape Coral, Fort Myers, Bonita Springs, the Village of Estero, the Town of Fort Myers Beach, and the City of Sanibel.
All enforce the Florida Building Code 8th Edition (2023), which adopts ASCE 7-22 for wind loads.
What changed dramatically after Ian was the interaction between wind and flood requirements. Most coastal Lee now sits in revised FEMA flood zones with higher Base Flood Elevations.
The NFIP's 50% substantial-damage rule means any structure damaged by more than half its market value must elevate to current BFE or be demolished.
For new or substantial construction west of US 41 in southern Lee, and across most of Sanibel, Captiva, Pine Island, and Fort Myers Beach, that forces breakaway wall construction below the BFE and elevated structural systems above it.
Engineers must then detail how lateral wind loads transfer through that elevated configuration into the pile or foundation system below. Lee also tightened permit review to require certified inspection at multiple stages.
The wind speed input to the calculation has not changed — it is still the ASCE 7-22 map value, or a pending FBC override. What rose is the burden of proving the structure realizes its calculated wind resistance.
Basic wind speed: ASCE 7-22 Figure 26.5-1 map value. FBC R301.2(7) override status pending verification.
HVHZ status: Not HVHZ. Standard FL Product Approval applies.
Code edition: Florida Building Code 8th Edition (2023), ASCE 7-22 by reference.
Permitting authorities: Lee County Community Development, City of Cape Coral, City of Fort Myers, Bonita Springs, Estero, Fort Myers Beach, City of Sanibel.
Post-Ian: FEMA flood-zone remapping, elevated BFE requirements, breakaway walls below BFE, intensified inspection of hurricane strap continuity.
Cape Coral falls in the ASCE 7-22 Figure 26.5-1 contour that reads roughly 160-165 mph for Risk Category II at the ZIP centroid.
Whether Lee County publishes a separate FBC R301.2(7) jurisdictional override that supersedes the ASCE value is something we are still verifying against current Florida Building Code text.
Until that verification is complete, this page reports the ASCE 7-22 map value rather than claim an FBC override number we have not yet confirmed.
Yes, in localized eyewall conditions. Ian's official maximum sustained winds at the Cayo Costa landfall were 150 mph, just shy of Cat 5, with a minimum pressure of 940 mb.
NOAA reconstruction placed peak sustained winds in the 145-155 mph range across northern Sanibel, Captiva, Pine Island, and the Fort Myers Beach corridor, with gusts comfortably above 175 mph.
That exceeded the ASCE 7-22 map value (~160-165 mph Cat II) for the worst-hit zones inside the radius of maximum wind.
Outside the eyewall — Cape Coral north, Bonita Springs south, inland Lehigh Acres — sustained winds stayed within the design envelope.
No, Sanibel and Captiva sit inside Lee County and share the county's ASCE 7-22 wind speed contour, which reads around 160 mph for Risk Cat II at the ZIP centroid.
What sets the islands apart is exposure: Sanibel's west-facing Gulf shoreline qualifies as Exposure D.
The unobstructed open-water fetch means design pressures on west-facing components run substantially higher than equivalent components on a mainland Fort Myers property even at the same basic wind speed.
Town of Fort Myers Beach permits issued post-Ian require new construction to comply with the Florida Building Code 8th Edition (2023) at the current ASCE 7-22 basic wind speed.
They add the FEMA flood-zone elevation requirements that became dramatically more restrictive after the storm.
Almost everything west of Estero Boulevard sits in VE flood zone, which forces breakaway-wall construction below the BFE and changes how lateral wind loads transfer into the foundation.
The wind speed input has not changed — what changed is how much of the structure must survive both wind and surge simultaneously.
We do not have a verified answer to this question yet. Collier's jurisdictional override at 170 mph was adopted relatively early after the FBC adopted ASCE 7-22.
Whether Lee County has done the same or relies on the ASCE map value alone is something our team is verifying directly with Lee County Community Development.
We will update this page once that verification is complete. Until then, treat the ASCE 7-22 map value as the floor.
Confirm directly with your local building department whether a Lee-specific override applies.
Type your project address into the calculator and get the ASCE 7-22 design wind speed, component pressures, and a permit-ready Engineering Report — with PE sign-and-seal available across all 50 states on request.