Far shore is a real field recording of the sea heard from a distance, at Puerto Escondido on the Pacific coast of Oaxaca, Mexico. Leonardo Santiago, a Mexican field recordist, made it and released it into the public domain. Its source gives no date, so we show none.
What you're hearing
Surf far off, a low and even wash rather than waves you could count, looped so it plays as long as you like. Play it quietly and it sits at the edge of hearing, the way the sea does from a room a few streets back. If you'd like the waves close, beach waves, recorded on Mexico's Caribbean coast, is one tap away.
Where the sound comes from
Far shore. Recorded by Leonardo Santiago at Puerto Escondido, Oaxaca, Mexico. Public domain (CC0). Original recording on freesound.org
Listen safely
This is a sound, played back through whatever speaker or headphones you already own. It doesn't diagnose, measure, or promise anything about how you sleep, focus, or feel — it's just noise and a handful of real recordings, mixed the way you like them.
Keep the volume low enough that you'd still notice a smoke alarm, a phone ringing, or someone at the door. If you fall asleep in headphones, choose a volume and a pair you'd be comfortable wearing all night, and a session length that ends when you'd want the sound to stop.
If you use this near a baby, keep the speaker several feet from the crib, never inside or clipped to it, and keep the volume low — the same care you'd take with any sound machine in a nursery.
If your relationship with sound, or with sleep, feels difficult rather than simply restless, a doctor or audiologist is the right person to talk to. This is a mixer, not a clinician.