What is Wind at altitude (AGL wind)?
Wind speed at flight altitude (typically 200–400 ft AGL) is generally 30–50% higher than ground-level wind because surface friction slows the lower air layer. Drone manufacturer wind-resistance specs are at sea level — they don't reflect actual flight conditions.
Surface friction (terrain, buildings, vegetation) slows the air layer immediately above the ground. The friction effect diminishes with altitude — by 200 ft AGL, wind is typically 25–35% higher than ground; by 400 ft AGL, 35–50% higher in open terrain. In urban areas with tall buildings, wind at flight altitude can be over 100% higher than at ground level due to channeling effects.
Drone manufacturers publish wind-resistance figures in their spec sheets, but these are typically instantaneous limits at sea level under controlled testing conditions. Real-world flight at 200–400 ft AGL routinely exceeds those limits even when ground wind seems acceptable.
Wind data at altitude is available from weather services (Open-Meteo, NOAA). Altoa surfaces wind specifically at 200–400 ft AGL in our airspace check rather than ground-level surface wind.
What this means for pilots
Always check wind at flight altitude, not ground wind. A 'breezy 12 mph at the surface' day is often 18–22 mph at 300 ft — beyond the operational limit of most consumer drones. Manufacturer wind specs are best treated as conservative ceilings, not targets.
FAQ
How much higher is wind at 400 ft AGL vs ground?
Typically 30–50% in open terrain. Higher in urban environments with channeling effects. Use weather data, not your gut.
Where can I check wind at altitude?
Open-Meteo (free, public API), NOAA, or any drone-specific tool that surfaces it. Altoa includes wind at flight altitude in airspace checks.
What's the realistic wind limit for a Mini 4 Pro?
Manufacturer specs say roughly 10 m/s sustained. In practical terms, treat sustained wind at flight altitude over 18–20 mph as the operational limit.
Related terms
FAA regulations change. Verify current rules at faa.gov/uas before relying on this article for flight planning. Altoa is not the FAA.