National Weather ServiceCaliforniaCoastal Flood AdvisoryArchive to October 1, 2026
Coastal Flood Advisories in California
The National Weather Service issued 33 coastal flood advisories for California in 2025 and 19 a year on average in 2008-2025; in 2021-2025 it had the 9th most of any state. 2026 through September: 42, 320% above the average of 10 for those months in 2008-2025. Northern Humboldt Coast was covered most often (137 times since 2008).
How many coastal flood advisories does California get?
Every coastal flood advisory that covered part of California. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 42 |
| 2025 | 33 |
| 2024 | 45 |
| 2023 | 54 |
| 2022 | 23 |
| 2021 | 20 |
| 2020 | 10 |
| 2019 | 28 |
| 2018 | 18 |
| 2017 | 17 |
| 2016 | 26 |
| 2015 | 20 |
| 2014 | 17 |
| 2013 | 4 |
| 2012 | 12 |
| 2011 | 5 |
| 2010 | 8 |
| 2009 | 1 |
| 2008 | 4 |
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 California 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 California?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Northern Humboldt Coast | 137 | 53 | February 24, 2026 |
| San Francisco | 91 | 59 | September 28, 2026 |
| North Bay Interior Valleys | 88 | 66 | September 28, 2026 |
| San Francisco Bay Shoreline | 83 | 59 | September 28, 2026 |
| Redwood Coast | 40 | 0 | January 23, 2016 |
| Southern Monterey Bay and Big Sur Coast | 40 | 16 | September 28, 2026 |
| Coastal North Bay (including Point Reyes National Seashore) | 39 | 11 | July 9, 2026 |
| Northern Monterey Bay | 39 | 16 | September 28, 2026 |
| San Diego County Coastal Areas | 33 | 11 | September 28, 2026 |
| Catalina and Santa Barbara Islands | 25 | 14 | September 28, 2026 |
| Mendocino Coast | 23 | 5 | January 4, 2026 |
| San Luis Obispo County Central Coast | 23 | 0 | January 27, 2021 |
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 California.