Wind channels and accelerates between the islands. Hawaii sits in ASCE 7-22 special wind regions, and every county runs its own CCPR product review. This calculator was built for both.
Hawaii is the reason ASCE 7-22 has a special-wind-region clause. The printed map speed is a starting point, not the answer.
ASCE 7-22 Section 26.5.3 designates parts of the Hawaiian Islands as Special Wind Regions. On those sites the basic map speed is not controlling. The engineer of record refines it from regional data.
Representative Risk Category II design speeds by ZIP. The engine returns the precise baseline for any Hawaii ZIP and raises an SWR alert where the map is not controlling.
| City / Island | County | Sample ZIP | Risk Cat II speed | Hawaii note |
|---|---|---|---|---|
| Honolulu (downtown) | City & County of Honolulu (Oahu) | 96813 | ~105–115 mph | Leeward urban core, Honolulu DPP; state baseline |
| Waikiki / Diamond Head | City & County of Honolulu | 96815 | ~110–120 mph Exp D | South-shore open ocean; lanai uplift fatigue real |
| Kaimuki / Kahala | City & County of Honolulu | 96816 | ~105–115 mph | South Oahu residential; partially-open lanai screens |
| Wailuku | Maui County (Maui DPW) | 96793 | ~115–130 mph SWR | Central Maui isthmus channeling |
| Kahului | Maui County (Maui DPW) | 96732 | ~115–130 mph SWR | North Maui shore + isthmus; refine V per §26.5.3 |
| Kihei | Maui County (Maui DPW) | 96753 | ~115–130 mph SWR | South Maui leeward coast; SWR check |
| Lihue | Kauai County (Kauai DPW) | 96766 | ~105–125 mph | Connection schedule + continuous load path govern |
| Princeville | Kauai County (Kauai DPW) | 96722 | ~105–125 mph SWR | North Kauai ridge + windward slope exposure |
| Hilo | Hawaii County (DPW) | 96720 | ~105–125 mph | Windward Big Island; tsunami history is a separate code |
| Kailua-Kona | Hawaii County (DPW) | 96740 | ~105–115 mph | Leeward Big Island; vog corrosion overlay |
Hawaii has no statewide product-approval list. Each county runs its own County Product Review on top of the State Building Code baseline.
A window or shutter accepted in one county is reviewed again in the next. The calculator surfaces the certified product pressure so you can check it against the required design pressure.
Enter a ZIP and the engine routes to the right county before pulling the ASCE 7-22 baseline.
On one island lot, several codes apply at once. Confusing any two produces wrong numbers. This calculator returns wind only and names the rest.
The northeast trade flow runs most of the year, well below design speed. It fatigues window seals, lanai screens, and salt-exposed connectors.
Hurricane design covers the rare extreme event under ASCE 7-22. We flag trade-wind serviceability on coastal output, separate from design pressures.
Hilo was struck by tsunamis on April 1, 1946 (159 dead) and May 23, 1960 (61 dead). Neither was a wind event.
Tsunami inundation runs under ASCE 7-22 Chapter 6, alongside the wind calc. We return wind loads only and never conflate the two.
Kilauea and Mauna Loa add two design factors the wind code does not capture. Ash loading adds transient roof load during eruptions.
Vog (volcanic fog) accelerates connector corrosion, pushing more aggressive corrosion specs on the same hurricane hardware.
Sites within a mile of unobstructed open ocean are Exposure D. That is most of populated coastal Hawaii.
From a ZIP to an Engineering Report your Hawaii PE can seal.
The engine routes to the correct county, pulls the ASCE 7-22 baseline, and defaults Exposure D on open-ocean shoreline.
If the ZIP sits in a special wind region, you get a flag to refine V per §26.5.3 and apply Kzt per §26.8.
Choose Cat I–IV, enter footprint, mean roof height, and X-in-12 pitch. C&C and MWFRS engines run together.
Compare each county-listed window, door, or shutter against the required design pressure before submittal.
PDF, Excel, or CSV. Built as the analysis basis your HRS Chapter 464 licensed engineer reviews and seals.
No paid testimonials — defensible facts only.
CCPR stands for County Product Review. Hawaii has no statewide product-approval list. Each county accepts windows, doors, and shutters on its own. The calculator surfaces the certified product pressure to compare against the required ASCE 7-22 demand.
ASCE 7-22 Section 26.5.3 designates parts of Hawaii as Special Wind Regions. Wind accelerates as it channels between islands and over ridges. The map speed is then not controlling; the engineer refines V and applies Kzt per Section 26.8.
Most populated Hawaii ZIPs sit in roughly 105 to 130 mph Risk Category II — Honolulu 96813, Waikiki 96815, Wailuku 96793, Kahului 96732, Kihei 96753, Lihue 96766, Princeville 96722, Hilo 96720, Kailua-Kona 96740.
Our in-house P.E. is Florida-licensed only. Hawaii Revised Statutes Chapter 464 requires a Hawaii-licensed engineer to seal permit work. The calculator produces the analysis; your Hawaii PE seals it. Sign-and-seal in all 50 states runs via our PE network.
All four. Honolulu (Oahu) under Honolulu DPP, Maui County under Maui DPW, Kauai County under Kauai DPW, and Hawaii County (Big Island) under Hawaii County DPW. Each runs its own CCPR review on top of the State Building Code.
Most populated Hawaii sites sit within a mile of open ocean — Exposure D under ASCE 7-22. We default D on windward shoreline, apply C for inland sites, and B in canopied or shielded interiors.
Yes. The free lookup returns the ASCE 7-22 baseline design wind speed for any Hawaii ZIP, no signup. The paid calculator adds C&C pressures, the connection schedule, CCPR product comparison, and the Engineering Report.
ASCE 7-22 for any island ZIP, special-wind-region aware, CCPR-ready, formatted for HRS Chapter 464 review. Or run the free wind speed lookup first.