Fog in Westerly, RI

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 6 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Westerly State Airport (KWST). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KWSTWesterly State Airport134 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 Westerly fogs in

Fog here concentrates in June and July — about 134 hours in a typical year at KWST, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KWST station page.

Fog season

January: ~7 hJanFebruary: ~13 hFebMarch: ~13 hMarApril: ~12 hAprMay: ~15 hMayJune: ~20 hJunJuly: ~17 hJulAugust: ~6 hAugSeptember: ~11 hSepOctober: ~6 hOctNovember: ~4 hNovDecember: ~8 hDec
Fog season runs December through October, peaking in June; fog is mostly a 2 AM–7 AM phenomenon; typically thinning out by 9 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.