This reports indicate either ship (type A) or buoy observations (type B).
At the category wave indicates Ø-period the average
wave period (seconds) of all waves during the 20-minute period.
The category max. period describes the dominant wave period (seconds)
with the maximum wave energy.
| Beaufort | knots | km/h | m/s |
| 0 | 0- 1 | 0- 1 | 0 - 0.2 |
| 1 | 1- 3 | 1- 5 | 0.3- 1.5 |
| 2 | 4- 6 | 6- 11 | 1.6- 3.3 |
| 3 | 7-10 | 12- 19 | 3.4- 5.4 |
| 4 | 11-15 | 20- 28 | 5.5- 7.9 |
| 5 | 16-21 | 29- 38 | 8.0-10.7 |
| 6 | 22-27 | 39- 49 | 10.8-13.8 |
| 7 | 28-33 | 50- 61 | 13.9-17.1 |
| 8 | 34-40 | 62- 74 | 17.2-20.7 |
| 9 | 41-47 | 75- 88 | 20.8-24.4 |
| 10 | 48-55 | 89-102 | 24.5-28.4 |
| 11 | 56-63 | 103-117 | 28.5-32.6 |
| 12 | >63 | >117 | >32.6 |
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