National Weather ServiceMassachusettsCoastal Flood WarningArchive to October 1, 2026
Coastal Flood Warnings in Massachusetts
The National Weather Service issued 0 coastal flood warnings for Massachusetts in 2025 and 3 a year on average in 2008-2025; in 2021-2025 it had the 17th most of any state. 2026 through September: 3, 42% above the average of 2 for those months in 2008-2025. Eastern Plymouth was covered most often (44 times since 2008).
How many coastal flood warnings does Massachusetts get?
Every coastal flood warning that covered part of Massachusetts. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 3 |
| 2025 | 0 |
| 2024 | 4 |
| 2023 | 1 |
| 2022 | 3 |
| 2021 | 2 |
| 2020 | 1 |
| 2019 | 2 |
| 2018 | 7 |
| 2017 | 3 |
| 2016 | 2 |
| 2015 | 3 |
| 2014 | 3 |
| 2013 | 2 |
| 2012 | 4 |
| 2011 | 2 |
| 2010 | 8 |
| 2009 | 2 |
| 2008 | 1 |
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 Massachusetts 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 Massachusetts?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Eastern Plymouth | 44 | 5 | September 25, 2026 |
| Barnstable | 40 | 6 | September 25, 2026 |
| Eastern Essex | 34 | 4 | September 25, 2026 |
| Nantucket | 33 | 7 | September 25, 2026 |
| Eastern Norfolk | 32 | 4 | September 25, 2026 |
| Suffolk | 31 | 4 | September 25, 2026 |
| Dukes | 20 | 6 | September 25, 2026 |
| Southern Bristol | 7 | 2 | January 13, 2024 |
| Southern Plymouth | 5 | 1 | January 13, 2024 |
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.
The latest coastal flood warnings for Massachusetts in AreaZine's record
NWS Boston/NortonWarningSeptember 27, 2026
Coastal Flood Warning: Eastern Essex, Suffolk, Eastern Norfolk and 4 more, MA
Expired 8:00 p.m. EDT, September 27, 2026
This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.
Source: National Weather Service alerts (api.weather.gov).
What is a coastal flood warning?
A coastal flood warning means seawater flooding of coastal roads and property is happening or expected, usually at high tide. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. The national record · Every warning type in Massachusetts.