National Weather ServiceDelawareCoastal Flood AdvisoryArchive to October 1, 2026
Coastal Flood Advisories in Delaware
The National Weather Service issued 22 coastal flood advisories for Delaware in 2025 and 26 a year on average in 2008-2025; in 2021-2025 it had the 11th most of any state. 2026 through September: 19, 6% above the average of 18 for those months in 2008-2025. Delaware Beaches was covered most often (400 times since 2008).
How many coastal flood advisories does Delaware get?
Every coastal flood advisory that covered part of Delaware. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 19 |
| 2025 | 22 |
| 2024 | 41 |
| 2023 | 39 |
| 2022 | 25 |
| 2021 | 17 |
| 2020 | 27 |
| 2019 | 21 |
| 2018 | 32 |
| 2017 | 27 |
| 2016 | 20 |
| 2015 | 7 |
| 2014 | 24 |
| 2013 | 15 |
| 2012 | 22 |
| 2011 | 39 |
| 2010 | 37 |
| 2009 | 35 |
| 2008 | 14 |
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 Delaware 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 Delaware?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Delaware Beaches | 400 | 109 | September 28, 2026 |
| Inland Sussex | 399 | 107 | September 28, 2026 |
| Kent | 348 | 94 | September 22, 2026 |
| New Castle | 289 | 63 | September 22, 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 Delaware.