Fog in Bar Harbor, ME

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 6%). August typically brings about 25 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Hancock County-Bar Harbor Airport (KBHB). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KBHBHancock County-Bar Harbor Airport183 h/yrlive forecast

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 Bar Harbor fogs in

Fog here concentrates in July and June — about 183 hours in a typical year at KBHB, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KBHB station page.

Fog season

January: ~3 hJanFebruary: ~10 hFebMarch: ~11 hMarApril: ~8 hAprMay: ~19 hMayJune: ~29 hJunJuly: ~33 hJulAugust: ~25 hAugSeptember: ~19 hSepOctober: ~12 hOctNovember: ~2 hNovDecember: ~9 hDec
Fog season is February, March, May, June, July, August, September, October, December, peaking in July; fog is mostly a 1 AM–7 AM phenomenon; typically thinning out by 9 AM; a typical event lasts about 2 hours once it forms local time · 10-yr average

Machine access: data.json · llms.txt · forecast verification. Not for operational use.