Hello Tom,
To complete Christophe's answer, with OPTION FOR WIND = 3, you have to implement the interpolation (spatial and temporal) as there is no general way to do it.
You should have a look at the METEO subroutine + wind_txy TELEMAC-2D example where you have an example to do this for wind variable only. You also should do the same for the required atmospheric variables (please read the WAQTEL user manual to see which one are expected).
If you only have 2 or 3 stations, you can try to read what is implemented in the METEO_TELEMAC module as the initial developer thought about these cases. Anyway, I am sorry that no example has been provided.
If you want to try this, for v8p2, please start from the METEO_TELEMAC module in the user_fortran folder of the example to handle a free format of atmospheric data file.
Hope this helps,
Chi-Tuan