Luis Munoz Marin International Airport turbulence forecast
San Juan, Puerto Rico
SJU (San Juan, Puerto Rico) sits at 18.44°N, 66.00°W, 9 ft elevation — coastal.
About SJU
Major airport serving San Juan, Puerto Rico.
- Climate
- Tropical coastal — warm, humid, convective
- Geography
- Coastal — marine-influenced airmass
What to expect on departures
Computed from SJU's geography and climate
At tropical latitude the jet stream is rarely directly overhead, so clear-air turbulence is less of a routine concern from SJU. Convective weather closer to the surface is the dominant turbulence source instead. San Juan's tropical climate means convective build-up is a year-round concern — afternoon and early-evening departures from SJU encounter the most cell activity. Morning slots and red-eye departures are typically the smoothest of the day.
Climbout notes
Climbout typically transitions from cool marine air to warmer continental air — a brief bumpy layer near the boundary is normal on summer afternoons.
Seasonal pattern
Convective turbulence cycles with the local wet/dry season rather than a strict calendar month — check regional rainy-season dates for the most accurate risk window.
- Peak turbulence
- Regional wet season
- Typically calmest
- Regional dry season
Departing from SJU?
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SJU turbulence FAQ
Is turbulence common on flights from SJU?
Luis Munoz Marin International Airport is best described as a tropical convective airport. At tropical latitude the jet stream is rarely directly overhead, so clear-air turbulence is less of a routine concern from SJU.
When is turbulence worst for San Juan flights?
Convective turbulence cycles with the local wet/dry season rather than a strict calendar month — check regional rainy-season dates for the most accurate risk window. Peak turbulence window: Regional wet season. Typically calmest: Regional dry season.
How accurate are Turbcast forecasts?
We combine live NOAA Aviation Weather Center data (PIREPs, SIGMETs, AIRMETs) with physics-based Ellrod and Richardson-number calculations derived from Open-Meteo pressure-level wind and temperature data. If a source is unavailable for a waypoint we show an em dash rather than invent a number.
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