Не очень понятно...

[leyrtkm]

Что такое волна 1 и волна 2, в чём отличие? И как, определить направление ветра по стрелочкам в прогнозе?

[idefix37]

@leyrtkm
See this related post:
https://community.windy.com/topic/17449/swell?_=1662014608922

Wind direction is shown by Particles animation and the exact direction is given by the picker. Here 0° means North wind. But in Settings you can toggle to Cardinal directions

[Gkikas LGPZ]

@idefix37
IMO , north winds must be coded as 360°.
Meteorological codes use 360 for North (and 0 for calm).