Find out what it all means
- F1 to F12
- Speed in knots,
- Speed in miles per hour
- Speed in kilometres per hour,
- Wave height
- Visible Conditions
- Photos
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Beaufort Scale Force
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Wind in MPH
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Wind in Knots
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Wind in Km/h
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Description - Wave Heights—Visible Condition
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Force 0
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0-1 |
0-1
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0-1
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Calm; Ht 0.0m ~ At sea no waves - glassy like appearance of sea.
On land smoke rises vertically.
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Force 1
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1 - 4
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1 - 3
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2 – 6
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Light Airs Ht 0m ~ At Sea wind makes glassy ripples on water.
On land direction of wind shown by smoke but not by wind vanes
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Force 2
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4 - 7
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4 - 6
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7 – 11
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Light breeze Ht 0.1m ~ At Sea smooth wavelets
On land wind felt on face; leaves rustle; ordinary wind vane moved by wind
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Force 3
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8 - 12
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7-10
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13 - 19
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Gentle breeze Ht 0.4m Slight ~ At sea slight waves no white horses.
On land eaves and small twigs in constant motion; wind extends light flag
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Force 4
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13 - 18
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11-16
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20 – 30
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Moderate breeze Ht 1m - Slight to moderate ~ At Sea waves described as with occasional white horses.
On land raises dust and loose paper; small branches are moved
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Force 5
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19 - 24
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17 - 21
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31- 39
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Fresh breeze Ht 2m Moderate ~ At sea consistent white horses
On land small trees in leaf begin to sway; crested wavelets form on lakes.
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Force 6
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25- 31
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22 - 27
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40 – 60
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Strong breeze Ht 3m Rough
At Sea large waves start to form, more extensive white foam crests, some blown spray.
On land large branches in motion; telephone wires whistle; umbrellas unsafe
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