Fog in Belfast

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 Belfast International Airport (EGAA). This station has climatology and live observations only.

Measuring stations

stationairportfog hours/yrforecast
EGAABelfast International Airport105 h/yrclimatology
EGACGeorge Best Belfast City Airport43 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 Belfast fogs in

Fog here concentrates in January and November — about 105 hours in a typical year at EGAA, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EGAA station page.

Fog season

January: ~22 hJanFebruary: ~6 hFebMarch: ~4 hMarApril: ~2 hAprMay: ~4 hMayJune: ~4 hJunJuly: ~4 hJulAugust: ~5 hAugSeptember: ~7 hSepOctober: ~6 hOctNovember: ~21 hNovDecember: ~21 hDec
Fog season runs September through February, peaking in January; fog is mostly a 10 PM–11 AM phenomenon; typically thinning out by 5 PM; 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.