The legally enforced design wind speed inside Miami-Dade is 175 mph per Florida Building Code R301.2(7), and the entire county sits inside the High Velocity Hurricane Zone where every exterior opening product needs a Miami-Dade NOA.
Calculating wind loads since 2002, online since 2006.
Inside Miami-Dade County the controlling basic wind speed for ordinary buildings is 175 mph at Risk Category II, written into Florida Building Code R301.2(7) as a county-wide minimum. That number is a direct legacy of the 1994 South Florida Building Code rewrite after Hurricane Andrew and was carried forward through every subsequent FBC edition, including the current 8th Edition (2023) adopting ASCE 7-22 with Florida amendments.
If an engineer skipped the FBC step and simply interpolated off the ASCE 7-22 Figure 26.5-1B basic wind speed contour map, the value across most of Miami-Dade would land somewhere in the 169–170 mph band — close to but below the legally enforceable code value. Miami-Dade plan reviewers check submittals against the FBC R301.2(7) county minimum, not the ASCE contour. Designing to 170 mph here is designing under-strength against the local code, and the permit will not pass review. The same county-wide override pattern applies across all four risk categories: 165 mph for Cat I, 175 for Cat II, 186 for Cat III, and 195 for Cat IV.
The lookup below hits the same engine the paid calculator runs. Every ZIP that falls inside Miami-Dade returns the 175 mph FBC override, with the supplanted ASCE 7-22 map value shown for comparison. Try Hialeah (33010), Homestead (33030), or any Miami-Dade ZIP you have on a project.
Miami is the county seat, but Miami-Dade spans roughly 2,000 square miles of incorporated cities, unincorporated areas, and barrier islands sandwiched between the Atlantic Ocean, Biscayne Bay, and the Everglades on the western edge. Every ZIP inside the county boundary inherits the same 175 mph Risk Category II value because the FBC override is countywide, but Exposure Category, terrain, and surge zone differ block by block — especially along the bay and ocean fronts.
| City | Primary ZIP | Wind Speed (Cat II) | Coastal / Inland | Reference |
|---|---|---|---|---|
| Miami | 33130 | 175 mph | Coastal | FBC R301.2(7) |
| Hialeah | 33010 | 175 mph | Inland | FBC R301.2(7) |
| Homestead | 33030 | 175 mph | Coastal | FBC R301.2(7) |
| Coral Gables | 33134 | 175 mph | Coastal | FBC R301.2(7) |
| Doral | 33172 | 175 mph | Inland | FBC R301.2(7) |
| Kendall | 33186 | 175 mph | Inland | FBC R301.2(7) |
| Aventura | 33180 | 175 mph | Coastal | FBC R301.2(7) |
| Miami Beach | 33139 | 175 mph | Coastal | FBC R301.2(7) |
Want the wind speed for a ZIP that isn't listed? Run the calculator on any Miami-Dade ZIP — all 33,783 US ZIPs are in the database.
Miami-Dade is the most building-code-shaping county in United States history. Three storms in three decades drove most of the modern wind-load thinking that now lives in the Florida Building Code and bled outward into ASCE 7 revisions adopted nationally.
HVHZ — the High Velocity Hurricane Zone — is a designation in the Florida Building Code that imposes a substantially stricter product-approval regime on top of the regular FBC. Only two counties in the entire state carry the HVHZ designation: Miami-Dade and Broward. Nowhere else in Florida, regardless of whether the local design wind speed is higher or lower, is HVHZ. This is a hard rule and a frequent source of confusion when comparing county wind maps.
Inside the HVHZ, every exterior product that resists wind pressure or wind-borne debris must carry a Miami-Dade Notice of Acceptance (NOA) issued by the Miami-Dade County Product Control Section. A statewide Florida Product Approval (FL#) alone does not satisfy the HVHZ; the NOA is the controlling document. NOAs are granted only after products pass the Testing Application Standards (TAS) developed in the wake of Andrew:
Calculating wind loads since 2002, online since 2006.
See the ASCE 7-22 wind speed by ZIP methodology for the underlying calculation engine.