National Weather ServiceMaineDense Fog AdvisoryArchive to October 1, 2026
Dense Fog Advisories in Maine
The National Weather Service issued 28 dense fog advisories for Maine in 2025 and 28 a year on average in 2008-2025; in 2021-2025 it had the 28th most of any state. 2026 through September: 20, 12% below the average of 23 for those months in 2008-2025. Coastal Washington was covered most often (253 times since 2008).
How many dense fog advisories does Maine get?
Every dense fog advisory that covered part of Maine. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 20 |
| 2025 | 28 |
| 2024 | 23 |
| 2023 | 64 |
| 2022 | 38 |
| 2021 | 35 |
| 2020 | 42 |
| 2019 | 21 |
| 2018 | 44 |
| 2017 | 41 |
| 2016 | 19 |
| 2015 | 27 |
| 2014 | 22 |
| 2013 | 18 |
| 2012 | 10 |
| 2011 | 12 |
| 2010 | 14 |
| 2009 | 24 |
| 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 Maine 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 Maine?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Coastal Washington | 253 | 73 | August 28, 2026 |
| Coastal Hancock | 251 | 70 | August 28, 2026 |
| Lincoln | 187 | 46 | June 28, 2026 |
| Knox | 183 | 45 | June 28, 2026 |
| Sagadahoc | 183 | 44 | June 28, 2026 |
| Coastal Waldo | 180 | 44 | June 28, 2026 |
| Coastal Cumberland | 174 | 41 | June 28, 2026 |
| Kennebec | 169 | 38 | June 28, 2026 |
| Interior Waldo | 162 | 36 | June 28, 2026 |
| Central Washington | 161 | 44 | August 28, 2026 |
| Coastal York | 160 | 35 | June 28, 2026 |
| Androscoggin | 158 | 36 | June 28, 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 dense fog advisory?
A dense fog advisory means fog will cut visibility to a quarter mile or less over a wide area. 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 Maine.