@suthagar1
Find details here:

Tide source is the harmonic method at locations where a tide gauge is available.
https://community.windy.com/topic/4841/tide-forecast-on-windy?_=1641285340632 Currents
https://community.windy.com/topic/15650/major-sea-currents-update-high-resolution-and-new-tidal-currents/13?_=1641285754545