Top-facebook2x Top-twitter2x Top-instagram2x Top-phone2x +44 (0)1534 732229 Top-email2x Email us Top-subscribe2x Subscribe Top-search2x Cart Login
Home > Other Boating > Navigation > Beaufort Scale
Home > Other Boating > Navigation > Beaufort Scale

Beaufort Scale

ForceMPHKPHSea Conditions
0Calm11Sea like a mirror.
1Light air1-31-3Ripples with the appearance of scales are formed, but without foam crests.
2Light breeze-74-6Small wavelets, short but more pronounced. Crests glassy but do not break.
3Gentle breeze8-127-10Large wavelets, crests begin to break. Foam glassy, perhaps scattered white horses.
4Moderate breeze13-1711-16Small waves, becoming longer, fairly frequent white horses.
5Fresh breeze18-2417-21Moderate waves, longer, many white foam crests. Chance of some spray.
6Strong breeze25-3022-27Large waves begin to form; white foam crests more extensive everywhere, probably some spray.
7Near gale31-3828-33Sea heaps up, white foam from breaking waves begins to be blown in streaks along the direction of the wind.
8Gale39-4634-40Moderately high waves, longer, edges of crests begin to break into spindrift. Well marked streaks of foam.
9Strong Gale47-5441-47High waves, dense streams of foam. Crests begin to topple, tumble and roll over. Spray may affect visibility.
10Storm55-6348-55Very high waves, long overhanging crests. Whole surface of the sea white. Tumbling of the sea heavy and shock-like. Visibility affected.
11Violent Storm64-7256-63Exceptionally high waves. Sea completely covered with foam. Edges of crests everywhere blown into froth. Sea completely white with driving spray.
12Hurricane73+64+Air filled with foam and spray. Sea completely white with driving spray. Visibility very seriously affected.
© 2018 St Helier Yacht Club powered by Sailing Club Manager