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Wind Speed Chart for Flagpoles

The factors in helping you determine what Flag Pole is right for you are: wind zone area, flagpole height, base diameter, wall thickness, and the size of the Flag you want to fly. The map below shows expected wind speeds for the next 50 years (since 1997) at 30 feet above ground level.

Wind Speeds across the USA

How to use these diagrams:

  1. Find your area on the map.
  2. Determine the maximum wind speed for your area utilizing the color chart provided.
  3. Find your wind speed on the chart below using both the Unflagged Wind Speed and the Flagged Wind Speed columns.
  4. Determine which flagpole is right for you.

Find in ground flag poles as listed below or every other type of flag pole you can imagine in our Flag Pole section of our Website.
 

Flag Pole Wind Speed Chart
Exposed Height (feet) Shaft Diameter (inches) Wall Thickness (inches) Unflagged Wind Speed (MPH) Flagged Wind Speed (MPH) Max. Flag Size (feet)
Base Top
15 3 2 .125 170 120 3 x 5
20 3 2 .125 123 85 5 x 8
20 4 2 .125 147 100 5 x 8
20 5 3 .125 230 120+ 5 x 8
20 5 3 .156 280 120+ 5 x 8
20 5 3 .188 288 120+ 5 x 8
20 6 3.5 .156 327 120+ 5 x 8
20 6 3.5 .188 356 120+ 5 x 8
25 3 2 .125 94 50 5 x 8
25 4 2 .125 120 85 5 x 8
25 5 3 .125 136 95 5 x 8
25 5 3 .156 175 110 5 x 8
25 5.5 3.5 .188 237 120+ 5 x 8
25 6 3.5 .156 233 120+ 5 x 8
25 6 3.5 .188 255 120+ 5 x 8
30 4 2 .125 97 50 6 x 10
30 5 3 .125 100 85 6 x 10
30 5 3 .156 114 85 6 x 10
30 6 3.5 .156 175 105 6 x 10
30 6 3.5 .188 200 120 6 x 10
35 5 3 .125 90 75 6 x 10
35 5 3 .156 91 80 6 x 10
35 6 3.5 .156 116 85 6 x 10
35 7 3.5 .156 166 110 6 x 10
35 7 3.5 .188 189 120 6 x 10
40 7 3.5 .156 122 85 8x12
40 8 3.5 .156 172 105 8x12
40 8 3.5 .188 178 120 8x12
45 8 3.5 .188 149 100 8x12
50 8 3.5 .188 115 85 10x15
50 10 4 .188 185 115 10x15
60 10 4 .188 121 85 12x18
60 10 4 .250 150 105 12x18
60 12 4.4 .250 179 120 12x18
70 10 4 .312 135 90 15x25
70 12 3.6 .250 153 105 15x25
80 12 4 .375 158 105 20x30

Find in ground flag poles as listed above or every other type of flag pole you can imagine in our Flag Pole section of our Website.

For other questions please contact us at (800) 445-0653 or email us at sales@flagandbanner.com. Note: The wind velocity and flag size ratings used in the above map is based upon the National Association of Architectural Metal Manufacturers' Guide Specifications for the Design of Metal Flagpoles, NAAMM Standard FP-1-90.