On Waves and sea what's difference between waves, swell 1, swell 2 (i'm using the info for spearfishing)

[cordeirojoao]

Hi guys,
I'm trying to get some info about sea and waves conditions in a way to pratice spearfishing.
Can you please me tell what's the difference between wves, swell 1, swell 2...

Thanks

[jrbidlot]

See the last part of my answer in
https://community.windytv.com/topic/3603/different-definitions-for-the-wave-periods-are-shown