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EPW WEA
File conversion

Convert EPW to WEA

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Is it possible to convert EPW to WEA?
Yes - EPW converts to WEA.

.wea is the Radiance/Daysim weather format for daylight simulation. EPW is converted to WEA by tools like the EnergyPlus weather converter or Ladybug, keeping only the fields daylight tools need.

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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How to convert EPW to WEA

Converting a .EPW file to .WEA lets you open the content in software that prefers the .WEA format, though some details may change compared with the original. We are still putting together the list of programs that handle .EPW files.

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

About these formats

.EPW EnergyPlus Weather File

An EPW file is an EnergyPlus Weather file - a plain-text file holding 8,760 rows of hourly weather data (temperature, humidity, solar radiation, wind speed) for one location. Open it in…

Open .EPW details →
.WEA Ecotect weather file

A .WEA file is associated with Ecotect weather, a data file.

Open .WEA details →