This is a paid asset, but now you can download Water Sounds Pack Free.
Detail this asset from Unity Store: Original Link
Water Sounds Pack v1.0
“If possible, please buy the package to support the developer”
Cafofo’s Water Sound Pack comes with 168 high-quality realistic water sound effects
🔊 Listen to the preview here
📄 Check the file list
Small and Large Splashes, Single and Multiple Bubbles, Drops, Small and Large Streams, Small and Large Waves, Underwater Loops and Movements… and much more.
This is a very versatile package, useful for games of various genres and styles