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Perth, Australia
PER (Perth, Australia) sits at 31.94°S, 115.97°E, 67 ft elevation — coastal.
Major airport serving Perth, Australia.
Computed from PER's geography and climate
The jet stream meanders across this latitude seasonally — PER sees its strongest CAT exposure in June–August, when the polar jet pushes equatorward and routes intersect it more often. December-onwards departures climb into cleaner upper-level flow. Monsoon months pump moisture and instability into the local airmass — expect significantly more convective turbulence during the wet season at PER, with much smoother cruise during dry-season operations. PER's coastal position means departures often transit from the cool marine boundary layer into warmer continental air within minutes of takeoff — a brief but reliable bumpy transition on warm-season afternoons when the sea breeze is set up.
Climbout typically transitions from cool marine air to warmer continental air — a brief bumpy layer near the boundary is normal on summer afternoons.
Southern Hemisphere winter (June–August) is when the subtropical jet strengthens, and that's when long-haul CAT is most likely. Southern summer (December–February) is the main convective window.
Get a real-time turbulence forecast for any scheduled flight out of Perth International Airport, with live wind, jet-stream analysis and pilot reports.
Perth International Airport is best described as a standard profile airport. The jet stream meanders across this latitude seasonally — PER sees its strongest CAT exposure in June–August, when the polar jet pushes equatorward and routes intersect it more often. December-onwards departures climb into cleaner upper-level flow. Monsoon months pump moisture and instability into the local airmass — expect significantly more convective turbulence during the wet season at PER, with much smoother cruise during dry-season operations. PER's coastal position means departures often transit from the cool marine boundary layer into warmer continental air within minutes of takeoff — a brief but reliable bumpy transition on warm-season afternoons when the sea breeze is set up.
Southern Hemisphere winter (June–August) is when the subtropical jet strengthens, and that's when long-haul CAT is most likely. Southern summer (December–February) is the main convective window. Peak turbulence window: Monsoon months (varies by hemisphere). Typically calmest: Dry season.
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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