Fog in Cardiff

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 Cardiff International Airport (EGFF). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EGFFCardiff International Airport170 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 Cardiff fogs in

Fog here concentrates in December and January — about 170 hours in a typical year at EGFF, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EGFF station page.

Fog season

January: ~28 hJanFebruary: ~23 hFebMarch: ~22 hMarApril: ~8 hAprMay: ~13 hMayJune: ~5 hJunJuly: ~5 hJulAugust: ~5 hAugSeptember: ~9 hSepOctober: ~5 hOctNovember: ~12 hNovDecember: ~36 hDec
Fog season is January, February, March, May, September, November, December, peaking in December; fog here can hit at any hour of the day; 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.