National Weather ServiceDelawareFlood WatchArchive to October 1, 2026
Flood Watches in Delaware
The National Weather Service issued 9 flood watches for Delaware in 2025 and 5 a year on average in 2008-2025; in 2021-2025 it had the 49th most of any state. 2026 through September: 10, 147% above the average of 4 for those months in 2008-2025. New Castle was covered most often (99 times since 2008).
How many flood watches does Delaware get?
Every flood watch that covered part of Delaware. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 10 |
| 2025 | 9 |
| 2024 | 9 |
| 2023 | 10 |
| 2022 | 5 |
| 2021 | 1 |
| 2020 | 4 |
| 2019 | 3 |
| 2018 | 8 |
| 2017 | 2 |
| 2016 | 1 |
| 2015 | 2 |
| 2014 | 5 |
| 2013 | 3 |
| 2012 | 3 |
| 2011 | 9 |
| 2010 | 4 |
| 2009 | 5 |
| 2008 | 7 |
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 |
|---|---|---|---|
| New Castle | 99 | 38 | September 13, 2026 |
| Kent | 30 | 12 | July 31, 2025 |
| Inland Sussex | 28 | 11 | July 31, 2025 |
| Delaware Beaches | 26 | 10 | July 31, 2025 |
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 flood watch?
A flood watch means conditions may lead to flooding in the coming day or days; it is not yet happening. A watch means the conditions for the hazard are possible or favourable, but it is not yet happening: be ready to act if a warning follows. The national record · Every warning type in Delaware.