Hawaii has about ~12,000 active NFIP flood insurance policies, with an average annual premium of $690/yr under FEMA's Risk Rating 2.0 methodology. The biggest flood risk areas in the state are North Shore Oahu, Kauai's north shore (Hanalei), Big Island low-lying coasts, Maui coastal zones. Private flood market availability: Limited.
NFIP Policies in Force
~12,000
Estimate, federal flood program
Avg NFIP Premium
$690/yr
Risk Rating 2.0 average
Private Flood Market
Limited
Carrier availability for higher limits
| Topic | Detail | Notes |
|---|---|---|
| Top risk areas | North Shore Oahu, Kauai's north shore (Hanalei), Big Island low-lying coasts, Maui coastal zones | Mandatory purchase in SFHA + federal mortgage |
| Recent major flood | Kauai catastrophic flooding (April 2018); 2024 Maui and Big Island flash floods | Drives claim data and premium revisions |
| Average NFIP premium | $690/yr | Risk Rating 2.0 phased increases (18%/yr cap) |
| CBRS coastal restrictions | Yes — CBRS zones present | NFIP unavailable on undeveloped CBRS barrier areas |
NFIP statistics from FEMA's national insurance data; premium averages reflect Risk Rating 2.0 phase-in. Private flood market sized from state department of insurance filings. Always verify your specific property's flood zone at floodsmart.gov.
Hawaii's flood risk is defined by two distinct threats: extreme rainfall-driven flooding in the mountains and valleys of its volcanic islands, and coastal tsunami and storm surge risk. Kauai's north shore receives some of the highest annual rainfall anywhere on Earth — up to 450 inches at Mount Waialeale — creating rapid-onset flooding in the Hanalei Valley and along streams that drain its cliffs. April 2018 brought catastrophic flooding to Kauai's north shore, destroying roads, isolating communities for weeks, and causing hundreds of millions in damage. The 2024 season brought severe flash flood events to Maui and the Big Island, highlighting recurring vulnerability in areas where steep volcanic terrain and thin soils produce flashy stream response to rainfall. Tsunami risk — while infrequent — represents the most catastrophic potential coastal flood peril, particularly for South Oahu, Hilo Bay, and the Maui coastline.
Hawaii has approximately 12,000 NFIP policies — relatively low for the exposure, partly because many Hawaiian properties are on high-value land where NFIP's $250,000 building limit is grossly inadequate, making private flood or excess flood coverage more appropriate. Private flood insurance is limited in Hawaii; most carriers are reluctant to write in a geographically isolated market with significant catastrophic potential. Risk Rating 2.0 brought moderate premium changes in Hawaii, with some coastal properties seeing increases and some inland properties seeing relief. The average statewide premium of approximately $690 per year reflects a mix of low-value rural structures and the few mid-range policies that are written.
Homeowners and renters policies categorically exclude flood damage. You must purchase a separate flood policy through the National Flood Insurance Program (NFIP) or a private flood insurer. Note: there's a standard 30-day waiting period from purchase to coverage, so don't wait until a storm is forecast.
NFIP residential policies cap building coverage at $250,000 and contents at $100,000. Homes worth more than these limits should consider 'excess flood' coverage through a private insurer or a fully-private flood policy with higher limits.
Major flood event affecting Hawaii: Kauai catastrophic flooding (April 2018); 2024 Maui and Big Island flash floods. Repeated severe events tend to push up local NFIP premiums and shift more properties into mandatory-purchase Special Flood Hazard Areas.
💡 Hawaii Pro Tip
Flood insurance is required for federally backed mortgage holders in Hawaii SFHAs — including coastal flood zones on all major islands, the Hanalei River floodplain on Kauai, stream corridors on the Big Island and Maui, and tsunami inundation zones. Given the extreme rainfall potential on Kauai and the Big Island, and the flash flood risk on steep volcanic terrain statewide, coverage is strongly recommended even outside mandatory zones. Many Hawaii mortgage lenders require flood insurance even for Zone X properties given the local risk environment.
Hawaii's average NFIP premium is approximately $690 per year. Coastal properties in high-risk areas — such as Hanalei on Kauai, Hilo Bay on the Big Island, or coastal Maui — may pay $800–$2,500 annually. Inland valley properties near streams on Oahu or Maui typically pay $500–$1,200. Zone X properties in lower-risk areas can access Preferred Risk Policies around $400–$600. Private flood coverage is difficult to obtain in Hawaii and expensive when available, making NFIP the primary option for most island homeowners despite its coverage limitations.
NFIP flood insurance in Hawaii covers surface water and stream flooding from intense tropical rainfall, riverine flooding from stream overflow (the most common event), coastal storm surge from tropical storms and hurricanes, tidal flooding in low-lying coastal areas, and mudflow caused by flooding. NFIP also covers damage from tsunamis, which qualifies as flooding under FEMA's definition — an important point given Hawaii's historical tsunami risk. It does not cover lava flow (a Hawaii-specific exclusion common to most policies), landslides without a general flood condition, or wave damage beyond the inundation zone.
Data sourced from FEMA NFIP statistics and state Department of Insurance filings for Hawaii, April 2026.
Michael Torres
Editorial Lead, Catastrophe & Commercial Property
This article was researched and written by the Cover Forge USA editorial team against federal sources (NAIC, CMS, FEMA, DOL, SSA, state DOIs) and standard policy forms. Bylines organize content by topic — they do not assert individual licensure. See our editorial-policy for details.
Reviewed April 2026
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