Beaufort Scale Explained
How wind speed is described by force number and sea state.
Author: OceanCalc Editorial Team · Publisher: Albor Digital LLC
The Beaufort scale from 0 to 12 describes wind speed by its effects—on the sea surface and on objects. Force 0 is calm; force 12 is hurricane. Each force has a range of wind speeds in knots and a description of typical sea state. Mariners and forecasters use it to communicate wind strength without always giving exact speed.
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Frequently Asked Questions
What is a small craft advisory?
In many regions, small craft advisories are issued when winds reach Force 6 (22–27 knots) or when sea conditions are hazardous for small boats. The exact criteria vary by country.