Fog in Lorient/Lann/Bihoué

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 5 hours of dense fog here (10-year average).

Measured at Lorient South Brittany (Bretagne Sud) Airport (LFRH). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
LFRHLorient South Brittany (Bretagne Sud) Airport90 h/yrclimatology

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 Lorient/Lann/Bihoué fogs in

Fog here concentrates in December and February — about 90 hours in a typical year at LFRH, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the LFRH station page.

Fog season

January: ~12 hJanFebruary: ~14 hFebMarch: ~3 hMarApril: ~4 hAprMay: ~4 hMayJune: ~4 hJunJuly: ~3 hJulAugust: ~5 hAugSeptember: ~6 hSepOctober: ~11 hOctNovember: ~8 hNovDecember: ~17 hDec
Fog season runs August through February, peaking in December; fog is mostly a 11 PM–10 AM phenomenon; typically thinning out by 1 PM; 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.