New Hampshire hurricane risk
Hillsborough County has the highest hurricane risk in New Hampshire, scoring 92.6 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Hillsborough County | 92.6 | Relatively Moderate | 0 |
| 2 | Carroll County | 86.4 | Relatively Moderate | 0 |
| 3 | Merrimack County | 84.8 | Relatively Moderate | 0 |
| 4 | Rockingham County | 83.8 | Relatively Moderate | 0 |
| 5 | Grafton County | 78.5 | Relatively Low | 0 |
| 6 | Belknap County | 78.4 | Relatively Low | 0 |
| 7 | Coos County | 77.1 | Relatively Low | 0 |
| 8 | Strafford County | 76.6 | Relatively Low | 0 |
| 9 | Cheshire County | 76.1 | Relatively Low | 0 |
| 10 | Sullivan County | 67 | Relatively Low | 0 |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Hurricane risk nationally:
Other hazard risks in New Hampshire:
Frequently asked questions
What is the highest hurricane risk county in New Hampshire?
Hillsborough County, NH has the highest hurricane risk in New Hampshire, with a FEMA National Risk Index score of 92.6 out of 100 (rated "Relatively Moderate").
What causes hurricane risk in New Hampshire?
Hurricane risk covers expected annual losses from tropical cyclone winds — storm surge is captured separately under coastal flooding. High scores concentrate along the Gulf Coast and Atlantic Seaboard from Texas through New England, with Florida's peninsula and barrier islands typically leading national rankings. The NRI score also accounts for population exposure and community resilience.