Fog in Carlsbad, CA

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 2 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at McClellan-Palomar Airport (KCRQ). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KCRQMcClellan-Palomar Airport86 h/yrverifying

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 Carlsbad fogs in

Fog here concentrates in November and October — about 86 hours in a typical year at KCRQ, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KCRQ station page.

Fog season

January: ~8 hJanFebruary: ~10 hFebMarch: ~10 hMarApril: ~5 hAprMay: ~1 hMayJune: ~1 hJunJuly: ~2 hJulAugust: ~2 hAugSeptember: ~4 hSepOctober: ~16 hOctNovember: ~18 hNovDecember: ~12 hDec
Fog season runs October through April, peaking in November; fog is mostly a 11 PM–7 AM phenomenon; typically thinning out by 8 AM; 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.