Hello Charlotta,
I assume you have Telemac-2d simulations running with winds that vary in time but constant in space. Make sure your Telemac-2d steering file saves the wind variables in the result file.
Then, assuming Tomawac simulations are on the same mesh as Telemac-2d result file that includes wind output, simply force the Tomawac run with the wind input of the Telemac-2d run.
You can do this with the following:
BINARY WINDS FILE = t2d_result_file_that_has_wind.res'
WINDS FILE FORMAT = 3
CONSIDERATION OF A WIND = YES
I hope it helps,
Pat