National Weather ServiceMarylandCoastal Flood AdvisoryArchive to October 1, 2026
Coastal Flood Advisories in Maryland
The National Weather Service issued 82 coastal flood advisories for Maryland in 2025 and 93 a year on average in 2008-2025; in 2021-2025 it had the 2nd most of any state. 2026 through September: 56, 16% below the average of 67 for those months in 2008-2025. Anne Arundel was covered most often (986 times since 2008).
How many coastal flood advisories does Maryland get?
Every coastal flood advisory that covered part of Maryland. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 56 |
| 2025 | 82 |
| 2024 | 150 |
| 2023 | 121 |
| 2022 | 75 |
| 2021 | 86 |
| 2020 | 107 |
| 2019 | 128 |
| 2018 | 141 |
| 2017 | 137 |
| 2016 | 91 |
| 2015 | 84 |
| 2014 | 87 |
| 2013 | 68 |
| 2012 | 83 |
| 2011 | 99 |
| 2010 | 40 |
| 2009 | 53 |
| 2008 | 33 |
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 Maryland 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 Maryland?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Anne Arundel | 986 | 243 | September 30, 2026 |
| St. Marys | 647 | 132 | September 22, 2026 |
| Southern Baltimore | 425 | 35 | June 1, 2026 |
| Calvert | 393 | 61 | September 22, 2026 |
| Dorchester | 320 | 71 | September 27, 2026 |
| Charles | 281 | 74 | September 29, 2026 |
| Somerset | 274 | 68 | September 27, 2026 |
| Wicomico | 273 | 66 | September 27, 2026 |
| Southeast Harford | 264 | 97 | September 29, 2026 |
| Maryland Beaches | 162 | 34 | September 27, 2026 |
| Harford | 150 | 0 | October 6, 2014 |
| Inland Worcester | 146 | 36 | September 27, 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 Maryland.