CALIFORNIA · SAN DIEGO COUNTY
Where the Pacific Meets the Border: San Diego Wind Loads
A marine-mild coast where seismic, not wind, sets the structural pace — yet Santa Ana gusts and open ocean exposure still shape every cladding decision.
MARINE LAYER · SANTA ANA · OPEN COAST
Two Wind Regimes on One Quiet Coastline
Cold Pacific currents hold hurricanes offshore and keep base speeds low, but the city still answers to onshore marine flow and dry, downslope Santa Ana events.
Onshore Marine Layer
Steady, moisture-laden Pacific flow off San Diego Bay and La Jolla drives the open-coast end of the speed range.
EXPOSURE C COASTSanta Ana Downslope Gusts
Hot, dry offshore winds spill through inland canyons in fall and winter — sharpest in the wildland-urban interface, milder than counties to the north.
FALL / WINTER EVENTSeismic Sets the Pace
Near the Rose Canyon, Elsinore and San Andreas systems, lateral design is seismic-driven (SDC D/E); wind governs cladding and components.
SDC D / EAcross most inland neighborhoods Exposure B applies; open frontage along the Pacific, Mission Bay and San Diego Bay can push a site to Exposure C. The boundary is a per-direction engineering judgment, not a citywide default.
PERMIT-READY CHECKLIST
What Clears a San Diego Plan Review
Six inputs the City and County reviewers expect locked down before a structural set moves.
Site Wind Speed
Pull V from the 95–110 mph Risk II band for the exact address — never one fixed mph citywide.
3-SEC GUSTExposure Call
Justify B vs C from upwind terrain per ASCE 7-22 §26.7, direction by direction near the water.
B OR CRisk Category
Set I–IV per Table 1.5-1; each tier reads a longer-return-period map and a higher speed.
TABLE 1.5-1CBC + ASCE 7-22
California Building Code (Title 24) adopts ASCE 7-22 with statewide seismic, energy and CALGreen amendments.
TITLE 24PE Seal
A California-licensed PE must sign and seal wind and seismic calcs for commercial and engineered work.
CA LICENSEDRight Jurisdiction
City of San Diego Development Services in the city; San Diego County Building Division in unincorporated areas.
CITY / COUNTYRETURN PERIOD MAPS
How Occupancy Lifts the Speed
Higher risk category means a longer-return-period map and a higher design speed — not a fixed multiplier.
| Risk Category | Map / Return Period | Typical San Diego Use |
|---|---|---|
| I | 300-yr MRI (lowest) | Minor ag, storage, temporary structures |
| II | 700-yr MRI (95–110 mph here) | Homes, retail, most occupancies |
| III | 1,700-yr MRI | Schools, assembly >300, hazardous materials |
| IV | 3,000-yr MRI (highest) | Hospitals, fire/EOC, essential facilities |
San Diego's Risk II band runs 95–110 mph (3-second gust) and varies by site; the exact mph depends on location and coastal exposure, so always confirm V against the address.
EXPAND YOUR SCOPE
Statewide Context & Official Sources
From the California overview to the desks that stamp San Diego permits.
California Requirements
Statewide CBC and ASCE 7-22 wind-load picture.
STATE GUIDEAll State Requirements
Compare adopted editions and speeds across the U.S.
50-STATE MAPCity Development Services
Permits and building requirements inside city limits.
OFFICIALCounty Building Division
Permitting for unincorporated San Diego County.
OFFICIALCA Building Standards
The commission that publishes Title 24.
TITLE 24CA PE Licensing Board
Verify the engineer sealing your calcs.
LICENSINGRUN THE NUMBERS
Price San Diego Loads by Address, Not Guesswork
Drop in a San Diego zip or street address and get site-correct V, Exposure B/C, risk-category speeds and PE-ready ASCE 7-22 output.