Wind Speeds Reference Chart

 

Description Wind Speed Land Conditions
km/h mph kts m/s
Calm < 1 < 1 < 1 < 0.3 Calm. Smoke rises vertically.
Light Air 1 – 5 1 – 3 1 – 2 0.3 – 1.5 Wind motion visible in smoke.
Light Breeze 6 – 11 3 – 7 3 – 6 1.5 – 3.3 Wind felt on exposed skin. Leaves rustle.
Gentle Breeze 12 – 19 8 – 12 7 – 10 3.3 – 5.5 Leaves and smaller twigs in constant motion.
Moderate Breeze 20 – 28 13 – 17 11 – 15 5.5 – 8.0 Dust and loose paper raised. Small branches begin to move.
Fresh Breeze 29 – 38 18 – 24 16 – 20 8.0 – 11 Branches of a moderate size move. Small trees begin to sway.
Strong Breeze 39 – 49 25 – 30 21 – 26 11 – 14 Large branches in motion. Whistling heard in overhead wires. Umbrella use becomes difficult. Empty plastic rubbish bins tip over.
High Wind, Moderate Gale, Near Gale 50 – 61 31 – 38 27 – 33 14 – 17 Whole trees in motion. Effort needed to walk against the wind. Swaying of large building may be felt, especially by people on the upper floors.