Fog in Longyearbyen

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 4 hours of dense fog here (10-year average).

Measured at Svalbard Airport; Longyear (ENSB). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
ENSBSvalbard Airport; Longyear26 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 Longyearbyen fogs in

Fog here concentrates in August and September — about 26 hours in a typical year at ENSB, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the ENSB station page.

Fog season

January: ~2 hJanFebruary: ~2 hFebMarch: ~3 hMarApril: ~2 hAprMay: ~0 hMayJune: ~2 hJunJuly: ~1 hJulAugust: ~4 hAugSeptember: ~3 hSepOctober: ~2 hOctNovember: ~1 hNovDecember: ~1 hDec
Fog season is January, February, March, April, June, August, September, October, peaking in August; fog is mostly a 2 AM–9 AM phenomenon; typically thinning out by 2 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.