| Knots |
Beaufort |
m/s |
km/h |
mph |
Designation |
Aspect of the sea |
| <1 |
0 |
0 – 0.2 |
<1 |
<1 |
Calm |
Clear |
| 1-3 |
1 |
0.3-1.5 |
1-5 |
1-3 |
Light breeze |
Small waves, but without foam |
| 4-6 |
2 |
1.6-3.3 |
6-11 |
4-7 |
Flojito (Brisa muy débil) |
Crests of glassy appearance, not breaking. |
| 7-10 |
3 |
3.4-5.4 |
12-19 |
8-12 |
Gentle (breeze) |
Small waves breaking crests. |
| 11-15 |
4 |
5.5-7.9 |
20-28 |
13-17 |
Light breeze (breeze) |
Numerous whitecaps increasingly long waves. |
| 16-21 |
5 |
8.0-10.7 |
29-38 |
18-24 |
Fresquito (Cool Breeze) |
Medium and elongated waves, whitecaps abundant. |
| 22-27 |
6 |
10.8-13.8 |
39-49 |
25-30 |
Fresco (breeze) |
Large waves begin to form, breaking crests, foam. |
| 28-33 |
7 |
13.9-17.1 |
50-61 |
31-38 |
Frescachón (strong wind) |
Heavy seas with foam dragged downwind. |
| 34-40 |
8 |
17.2-20.7 |
62-74 |
39-46 |
Temporary (hard wind) |
Large breaking waves, foam stripes. |
| 41-47 |
9 |
20.8-24.4 |
75-88 |
47-54 |
Temporary strong (very hard) |
Very large, Surf. Impaired visibility. |
| 48-55 |
10 |
24.5-28.4 |
89-102 |
55-63 |
Storms (Temporary) |
Thick tufted waves with crests. White Sea area. |
| 56-63 |
11 |
28.5-32.6 |
103-117 |
64-73 |
Severe storm (Borrasca) |
Exceptionally large waves, sea completely white, very low visibility. |
| 64-71 |
12 |
>32.7 |
>118 |
>74 |
Temporary hurricane (Hurricane) |
The air is filled with foam and spray. Huge waves. Almost zero visibility. |
