Fog in Sydney (Mascot), NSW

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. dense fog (visibility under a mile) is rare here in August (10-year average).

Measured at Sydney Kingsford Smith International Airport (YSSY). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
YSSYSydney Kingsford Smith International Airport6 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 Sydney (Mascot) fogs in

Fog here concentrates in June and July — about 6 hours in a typical year at YSSY, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the YSSY station page.

Fog season

January: ~0 hJanFebruary: ~0 hFebMarch: ~1 hMarApril: ~0 hAprMay: ~1 hMayJune: ~2 hJunJuly: ~1 hJulAugust: ~0 hAugSeptember: ~0 hSepOctober: ~0 hOctNovember: ~0 hNovDecember: ~1 hDec
Fog season is June, peaking in June; fog is mostly a 4 AM–9 AM phenomenon; typically thinning out by 10 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.