National Weather ServiceNew HampshireCoastal Flood AdvisoryArchive to October 1, 2026
Coastal Flood Advisories in New Hampshire
The National Weather Service issued 2 coastal flood advisories for New Hampshire in 2025 and 11 a year on average in 2008-2025; in 2021-2025 it had the 20th most of any state. 2026 through September: 4, 49% below the average of 8 for those months in 2008-2025. Coastal Rockingham was covered most often (196 times since 2008).
How many coastal flood advisories does New Hampshire get?
Every coastal flood advisory that covered part of New Hampshire. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 4 |
| 2025 | 2 |
| 2024 | 21 |
| 2023 | 12 |
| 2022 | 10 |
| 2021 | 8 |
| 2020 | 15 |
| 2019 | 10 |
| 2018 | 19 |
| 2017 | 14 |
| 2016 | 15 |
| 2015 | 4 |
| 2014 | 11 |
| 2013 | 12 |
| 2012 | 4 |
| 2011 | 6 |
| 2010 | 17 |
| 2009 | 4 |
| 2008 | 8 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does New Hampshire get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in New Hampshire?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Coastal Rockingham | 196 | 39 | September 26, 2026 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
What is a coastal flood advisory?
A coastal flood advisory covers minor coastal flooding at high tide, such as water on shore roads and low parking lots. An advisory is issued for a hazard less serious than a warning that can still cause inconvenience or danger if people are not careful. The national record · Every warning type in New Hampshire.