User`s guide

Calm Flat. Calm. Smoke rises
vertically.
< 1 km/h
< 1 mph
< 1 kn
< 0.3 m/s
0 m
0 ft
Light air
1.1–5.5 km/h
1–3 mph
1–2 kn
0.3–1.5 m/s
0–0.2 m
0–1 ft
Ripples without
crests.
Smoke drift indicates
wind direction, still
wind vanes.
Light breeze 5.6–11 km/h
4–7 mph
3–6 kn
1.6–3.4 m/s
0.2–0.5 m
1–2 ft
Small wavelets.
Crests of glassy
appearance, not
breaking
Wind felt on exposed
skin. Leaves rustle,
vanes begin to move.
Gentle breeze 12–19 km/h
8–12 mph
7–10 kn
3.4–5.4 m/s
0.5–1 m
2–3.5 ft
Large wavelets.
Crests begin to break;
scattered whitecaps
Leaves and small twigs
constantly moving, light
flags extended.
Moderate breeze 20–28 km/h
13–17 mph
11–15 kn
5.5–7.9 m/s
1–2 m
3.5–6 ft
Small waves with
breaking crests.
Fairly frequent
whitecaps.
Dust and loose paper
raised. Small branches
begin to move.
Fresh breeze 29–38 km/h
18–24 mph
16–20 kn
8.0–10.7 m/s
2–3 m
6–9 ft
Moderate waves of
some length. Many
whitecaps. Small
amounts of spray
Branches of a moderate
size move. Small trees
in leaf begin to sway.
0 1 2 3 4 5
Beauf. Description Wind speed Wave height Sea conditions Land conditions
no.
Beaufort scale
10