What you're hearing
Ocean waves is the least even sound here, which is the point: you hear each wave come in and draw back. Distant surf is the opposite, a smooth roar from behind the dunes with no wave rhythm at all. Together they make a shoreline you can sit in front of.
The Water group also has a pebble beach, a calm lake, a river, a brook and a waterfall, and Birds has seagulls. Starting points like Seaside and Under sail put several together. The sea sounds were made with AI and are marked AI in the list.