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    What is the difference between the three swell maps?

  • Sailor Moderator

    The seastate that you can observe in a given place, is a mix of different type of waves:

    • The windsea (also called wind waves) is produced by the local wind.

    • The main swell is produced by a strong wind in a remote place. The swell travels great distances to where you observe it.

    • Secondary swells are produced also by winds in other remote places.

    All of them have different heights, come from different directions and show different periods (i.e. the time between 2 wave crests)
    Swell 1 is the main swell,
    Swell 2 and 3 are secondary swells
    The swell classification 1, 2, 3 depends on their respective heights

    You find this detail on Windy by pressing the amber arrow on the picker.


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