Later that afternoon, they went for a stroll along the beach.

[alpacinou]

Is this correct and natural?

Later that afternoon, they went for a stroll along the rocky beach. They stood on shore, gazing at the restless sea as waves crashed to the rocks with a loud whoosh, spraying their faces with frothing water.

 

[emsr2d2]

Is this correct and natural?

Later that afternoon, they went for a stroll along the rocky beach. They stood on the shore, gazing at the restless sea as waves crashed onto the rocks with a loud whoosh, spraying their faces with frothing water.

See above. I don't like the underlined part.

 

[alpacinou]

See above. I don't like the underlined part.

Thank you. Is there a word for the sound of waves? What do I replace that with?

 

[emsr2d2]

In my opinion, saying they "crashed" suffices. "Crash" is a sound as well as an action.