Install ROMS.jl in julia 1.6 or later with the folling command executed in Julia:
using Pkg
Pkg.add(url="https://github.com/Alexander-Barth/ROMS.jl", rev="master")
Documentation is available here.
Thanks to Hernan G. Arango and John Wilkin from the ROMS/TOMS Group for the matlab scripts to process the ECMWF fields and vertical coordinate transformations (released under a MIT/X style license) and Pierrick Penven for the matlab script allowing to smooth the bathymetry (released under the GPL).