Beaufort |
Wind speed |
Description |
Wave |
knots |
m/s |
English |
Norsk |
metres |
0 |
Under 1 |
Under 0.3 |
Calm |
Stille |
0 |
Sea conditions: Flat. |
1 |
1 to 2 |
0.3-1.5 |
Light air |
Flau vind |
0.1 |
Sea conditions: Ripples without crests. |
2 |
3 to 5 |
1.5-3.3 |
Light breeze |
Svak vind |
0.2 |
Sea conditions: Small wavelets. Crests of glassy appearance, not breaking |
3 |
7 to 10 |
3.3-5.5 |
Gentle breeze |
Lett bris |
0.6 |
Sea conditions: Large wavelets. Crests begin to break; scattered whitecaps |
4 |
11 to 15 |
5.5-8.0 |
Moderate breeze |
Laber bris |
1 |
Sea conditions: Small waves. |
5 |
16 to 20 |
8.0-10.8 |
Fresh breeze |
Frisk bris |
2 |
Sea conditions: Moderate (1.2 m) longer waves. Some foam and spray. |
6 |
21 to 26 |
10.8-13.9 |
Strong breeze |
Liten Kuling |
3 |
Sea conditions: Large waves with foam crests and some spray. |
7 |
27 to 33 |
13.9-17.2 |
Moderate gale |
Stiv kuling |
4 |
Sea conditions: Sea heaps up and foam begins to be blown in streaks in wind direction. |
8 |
34 to 40 |
17.2-20.7 |
Fresh gale |
Stark kuling |
5.5 |
Sea conditions: Moderately high waves with breaking crests forming spindrift. Streaks of foam. |
9 |
41 to 47 |
20.7-24.5 |
Strong gale |
Liten storm |
7 |
Sea conditions: High waves (6-7 m) with dense foam. Wave crests start to roll over. Considerable spray. |
10 |
48 to 55 |
24.5-28.4 |
Storm |
Full storm |
9 |
Sea conditions: Very high waves. Large patches of foam from wave crests give the sea a white appearance. |
11 |
56 to 63 |
28.4-32.6 |
Violent storm |
Sterk storm |
Sea conditions:11.5 |
Sea conditions: Exceptionally high waves. Very large patches of foam, driven before the wind, cover much of the sea surface. |
12 |
Over 63 |
Over 32.5 |
Hurricane-force |
Orkan |
Over 14 |
Sea conditions: Huge waves. Sea is completely white with foam and spray. Air is filled with driving spray, greatly reducing visibility. |