@bullicante
I see, you get at first the direction arrows of wave types. That’s because you have selected one of your favourites (Porto Ercole): It opens the forecast diagram and give directly the direction arrows.
To get the same picker as the one I’ve shown, you must click just near your favourite location.
0_1540225787551_FD70ACD6-DF90-4846-99FF-3AC634A25B3C.jpeg
Don’t worry if it’s not exactly on your favourite location because the wave model has a resolution of 13km.
Note that close to the sea shore wave models cannot be very accurate. They give the wave conditions offshore.
(Your website is very nice !)