The Beaufort Scale is the way to see if today is a good day…

The Beaufort scale was long in use as a system for estimating wind speeds.
It was introduced in 1805 by Admiral Sir Francis Beaufort (1774-1857) of
the British navy to describe wind effects on a fully rigged man-of-war sailing
vessel, and it was later extended to include descriptions of effects on land
features as well.

On the Bft. scale noted below, from number 6 to number 12, DO NOT FLY a kite.


 
 Bft.                                           Surroundings                                 Wind               Knots     KM/H    MPH    M/S
  0   Smoke rises vertically and the see is mirror smooth                           Calm                   0             0            0         0
  1   Smokes moves slightly with breeze and  shows direction of wind         Light air             1-3         1-5           1-3      <2
  2   You can feel wind on your face and hear the leaves start to rustle           Light breeze        4-6        6-11          4-7    2-3
  3   Smoke will move horizontally and small branches start to sway.          Gentle breeze      7-10      12-19         8-12    4-5
        Wind extends a light flag                        
  4   Loose dust or sand on the ground will move and larger branches           Moderate breeze  11-16    20-28        13-18    6-7
       will sway, loose paper blows around, and fairly frequent
       whitecaps occur.        
  5   Surface waves form on water and small trees sway                              Fresh breeze       17-21    29-38        19-24    8-10
  6   Trees begin to bend with the force of the wind and causes                    Strong breeze     22-27    39-49        25-31    11-13
        whistling in telephone wires and some spray on the sea surface    
  7   Large trees sway                                                                           Moderate gale      28-33    50-61       32-38    14-16
  8   Twigs break from trees.                                                                 Fresh gale            34-40    62-74      39-46    17-20
  9   Branches break from trees                                                               Strong gale          41-47   75-88       47-55    21-24
10  Weak trees are uprooted, and the sea takes on a white appearance            Whole gale          48-55    89-102     56-64    25-28
11  Widespread damage                                                                        Storm                 56-63   103-117    65-73    29-32
12  Structural damage on land and storm waves at sea                                Storm