Fog in Beverly / Danvers, MA
daily fog outlook & 2016–2026 climatology
Fog possible — NWS guidance shows a fog signal in the next 48 hours. August typically brings about 7 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly
Measured at Beverly Regional Airport (KBVY). This station is in forecast verification — percentages publish when it clears the accuracy bar.
Measuring station
| station | airport | fog hours/yr | forecast |
|---|---|---|---|
| KBVY | Beverly Regional Airport | 81 h/yr | verifying |
Fog is measured where instruments live — airports. Hours/yr = time below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), the aviation definition of seriously dense fog.
When Beverly / Danvers fogs in
Fog here concentrates in September and December — about 81 hours in a typical year at KBVY, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KBVY station page.
Fog season
Fog season is January, February, March, April, June, July, August, September, October, December, peaking in September; fog is mostly a 1 AM–7 AM phenomenon; typically thinning out by 11 AM; a typical event lasts about 1 hour once it forms local time · 10-yr average
Machine access: data.json · llms.txt · forecast verification. Not for operational use.