Windsock windspeed guide

Are windsocks calibrated?

Brand new windsocks are produced according to the guidelines of the ICAO. This means that all current models are calibrated to be fully inflated at wind speeds of 15 knots or more.

What are the windsock speed charts?

The stripes on a windsock are not only chosen to be visible from a great distance. If a stripe is “blown up” by the wind, you can use it to read the current windspeed.

1. 3 knots
2. 6 knots
3. 9 knots
4. 12 knots
5. 15 knots or more