A scale from 0 to 12 that classifies wind speed based on observed sea conditions, originally developed for sailing in 1805.
The Beaufort Scale was created by Sir Francis Beaufort to help sailors estimate wind speed by looking at the sea state. Force 0 is calm (mirror-flat water), Force 4 (11–16 knots) has small waves with whitecaps, and Force 12 is hurricane-force winds.
For watersports, the sweet spot depends on your activity: surfers prefer Force 1–3 (light wind, clean waves), kitesurfers typically ride in Force 4–6 (11–27 knots), and windsurfers can handle Force 5–7 (17–33 knots) with appropriate gear. The scale is still useful when you don't have instruments — if you see whitecaps everywhere, it's at least Force 4.
If spray is being blown off the wave crests, it's Force 6 or above. Modern GPS devices and weather apps give exact wind speeds, but understanding the Beaufort Scale helps you read conditions at a glance.
Example usage
"It's easily Force 5 out there — whitecaps on every wave, spray starting to fly. Time for the small kite."
Watersports Tracker records your speed, distance, route, and more — for 24+ sports.