Beaufort Wind Scale

A chart detailing the Beaufort Wind Scale.
Grades:
6 |
7 |
8 |
9

The Beaufort Wind Scale was designed in 1805 by Sir Francis Beaufort, a rear admiral in the British navy, to describe the wind's effect on sailing ships. The scale is a series of numbers from 0 to 17 that indicate wind speed.

Number Name Miles Per Hour
0 Calm less than 1
1 Light air 1-3
2 Light breeze 4-7
3 Gentle breeze 8-12
4 Moderate breeze 13-18
5 Fresh breeze 19-24
6 Strong breeze 25-31
7 Moderate gale 32-38
8 Fresh gale 39-46
9 Strong gale 47-54
10 Whole gale 55-63
11 Storm 64-73
12-17 Hurricane 74 and above

Start a 7-day free trial today and get 50% off!

Use promo code TOGETHER at checkout to claim this limited-time offer.

Start your free trial

Select from a monthly, annual, or 2-year membership plan starting at $2.49/month. Cancel anytime.