How to I find the wind load for speeds at 130 mph?

Prescriptive method values should be available in applicable Building Code; Residential (or) General Construction. Numerous proprietary software available to give detailed wind loads (psf) for economical price.

It depends on temperature, air density, vapor pressure, etc. but in general for a 77 degree F day it works out to about 45 to 46 ponds per square inch.

Hope this helps,

Newton1Law

Applicable building code should have values for prescriptive methods.

The pressure on a beach house with a 130 mph wind can be calculated using ASCE 7-10 or the Wood Frame Construction Manual gives prescriptive methods for building with wood.