Fog in Cascais

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 1 hour of dense fog here (10-year average).

Measured at Cascais Airport (LPCS). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
LPCSCascais Airport32 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 Cascais fogs in

Fog here concentrates in January and February — about 32 hours in a typical year at LPCS, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the LPCS station page.

Fog season

January: ~5 hJanFebruary: ~4 hFebMarch: ~2 hMarApril: ~0 hAprMay: ~0 hMayJune: ~1 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~3 hSepOctober: ~3 hOctNovember: ~1 hNovDecember: ~3 hDec
Fog season is January, February, March, September, October, December, peaking in January; fog is mostly a 7 AM–9 AM phenomenon; typically thinning out by 1 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.