Fog in Grímsey/Sandvík

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 Grímsey Airport (BIGR). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
BIGRGrímsey Airport153 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 Grímsey/Sandvík fogs in

Fog here concentrates in July and June — about 153 hours in a typical year at BIGR, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the BIGR station page.

Fog season

January: ~2 hJanFebruary: ~2 hFebMarch: ~2 hMarApril: ~3 hAprMay: ~12 hMayJune: ~11 hJunJuly: ~17 hJulAugust: ~5 hAugSeptember: ~9 hSepOctober: ~3 hOctNovember: ~0 hNovDecember: ~1 hDec
Fog season runs May through September, peaking in July; fog is mostly a 7 AM–8 AM phenomenon; typically thinning out by noon; 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.