Average equal-duration wind observations without averaging compass angles directly.
Use this tool
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Introduction & principle
Convert each observation into u and v, take the arithmetic mean of each component, then reconstruct speed and wind-from direction. Each row is equal weight. The vector speed differs from the scalar average and can cancel to zero.
Worked example
10 m/s from 350° and 10° average to about 9.85 m/s from north, not a southerly 180° wind. Equal opposing winds cancel.
Detailed usage guide
1Paste or locally open CSV with speed_ms,direction_deg.
2Use equal-duration observations in m/s and wind-from degrees. A calm row may leave direction blank.
3Read vector and scalar means separately; do not use equal weighting for irregular duration samples.
Common problems & FAQ
Why is mean speed lower than the scalar average?
Changes in direction partly cancel u/v components. Vector speed can be zero even when each sample has substantial speed; scalar mean speed retains that separate information.
