Guide · Wind
Drone wind limits: can I fly today?
Two numbers decide it: the wind where you stand and the wind where the aircraft will be. Here is the official line in Japan, what the manufacturer's number really means, and a free tool that answers the question for your place, hour by hour.
The short answer
Do not fly when wind at ground level is 5 m/s or more. That is the line in Japan’s standard manual for unmanned aircraft operations, published by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT), which most permit holders adopt as their own operating rule. Below 5 m/s, read the gusts and the wind at altitude before you decide.
Rather than reading forecasts for three places, open Airffic Weather → Fly or not. It lists wind at 10 m, wind at 80 m and gusts for the next 12 hours at your location, and marks every hour that crosses the line. No account, no key.
Two numbers, not one
The manual’s number is a working limit. 5 m/s is where a hover starts to cost battery, a return-to-home fights the wind and a landing drifts. It is deliberately conservative because the manual is written for flights that need a permit.
The manufacturer’s number is a survival limit. “Max wind resistance 12 m/s” means the aircraft can still hold position at 12 m/s in a test. It does not mean the flight is safe, that the battery will last, or that the camera will be steady. Check your own aircraft’s manual, and treat the manufacturer’s figure as a ceiling you never approach.
Wind also grows with height. A calm 3 m/s at your feet is commonly 5 to 7 m/s at 80 m, which is why the tool shows the 80 m wind separately. If the 80 m number crosses 5 m/s, plan a lower flight or a different hour.
Reading the wind without an instrument
| Wind | What you see | The call |
|---|---|---|
| 0 – 3 m/s | Smoke drifts, leaves rustle | Fly. Watch the gust column anyway. |
| 3 – 5 m/s | Leaves and twigs in constant motion, a light flag extends | Fly with care. Keep the aircraft upwind of you and land with margin. |
| 5 – 8 m/s | Small branches move, dust and paper lift | Do not fly under Japan's standard manual. Consumer aircraft will hold position but drift on landing. |
| 8 m/s + | Whole small trees sway, hard to hold an umbrella | Ground the aircraft. Above most consumer wind-resistance ratings once gusts are included. |
The descriptions follow the Beaufort scale. A hand-held anemometer costs less than a propeller set and removes the guesswork.
Gusts, rain and the rest of the sky
Gusts are the number that matters for the aircraft. A 4 m/s average with 9 m/s gusts is a 9 m/s flight. Rain is a no under the same manual, and water does more damage to motors and gimbals than a rough landing. Cold shortens battery life sharply below about 10 °C: plan shorter flights and keep spares warm. Thunder anywhere on the horizon ends the day.
Wind is one line on the pre-flight list, not the whole list. The pre-flight checklist covers airspace, permits, batteries and the people around you.
Questions people ask
What wind speed is safe for a drone?
There is no single number. Japan's official standard manual for drone operations (MLIT, Civil Aviation Bureau) says not to fly when ground wind is 5 m/s or more. Manufacturers state a higher "wind resistance" per model, often around 10 to 12 m/s for consumer aircraft, but that is the aircraft's limit, not a safe working margin. Use the lower of the two, and treat gusts as the real number.
Is 5 m/s a lot of wind?
5 m/s is about 18 km/h or 11 mph: leaves and small branches move, a flag flies out straight. It feels like a light breeze on the ground and it is stronger at 50 to 100 m up, where the aircraft is.
Why does wind at 80 m matter?
Wind usually increases with height. A forecast of 4 m/s at ground level can be 7 m/s at 80 m. The Airffic Weather tool shows both the 10 m and 80 m wind for the next 12 hours so you are not surprised on the way up.
Do gusts count?
Yes. A steady 4 m/s with gusts to 9 m/s is a 9 m/s day for the aircraft. Gusts are what tip a hover, drift a landing and drain a battery. Read the gust column before the average.
Can I fly in light rain?
Most consumer drones are not rated for rain. Water in the motors and on the camera is a bigger risk than the rain itself. The same manual that sets the 5 m/s line also says not to fly in rain or when rain is expected during the flight.
Sources
- MLIT Civil Aviation Bureau, standard operating manual for unmanned aircraft (無人航空機 飛行マニュアル): no flight at ground wind of 5 m/s or more, no flight in rain.
- Forecast data in Airffic Weather: Open-Meteo (CC BY 4.0), wind at 10 m and 80 m, gusts, hourly.
Updated 2026-09-24. This page is a guide, not legal advice. Your permit conditions and aircraft manual take precedence.
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