@boatrip
Do you mean that?
https://community.windy.com/topic/4890/windy-brings-new-waves-radar-and-additional-isolines
Select, waves, location, forecast for this location. Steps 1,2,3 at the following image
0_1522010645158_d6ce08dd-ba2e-448a-b104-bf2072427996-εικόνα.png