Fog in Oceanside, 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 Camp Pendleton MCAS (Munn Field) Airport (KNFG). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring stations

stationairportfog hours/yrforecast
KNFGCamp Pendleton MCAS (Munn Field) Airport53 h/yrverifying
KOKBOceanside Municipal Airport49 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 Oceanside fogs in

Fog here concentrates in November and December — about 53 hours in a typical year at KNFG, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KNFG station page.

Fog season

January: ~8 hJanFebruary: ~4 hFebMarch: ~6 hMarApril: ~5 hAprMay: ~1 hMayJune: ~2 hJunJuly: ~1 hJulAugust: ~2 hAugSeptember: ~3 hSepOctober: ~5 hOctNovember: ~8 hNovDecember: ~8 hDec
Fog season is January, February, March, April, June, August, September, October, November, December, peaking in January; fog is mostly a 1 AM–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.