Fog in Santa Monica, CA

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 1 hour of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Santa Monica Municipal Airport (KSMO). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KSMOSanta Monica Municipal Airport47 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 Santa Monica fogs in

Fog here concentrates in November and February — about 47 hours in a typical year at KSMO, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KSMO station page.

Fog season

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