What is the collective noun for waves?

There isn't a single, universally accepted collective noun for waves. Here are a few options you could use, depending on the context:

General:

* A surge of waves

* A swell of waves

* A set of waves

* A series of waves

More specific:

* A crash of waves (for breaking waves)

* A ripple of waves (for small waves)

* A storm of waves (for large, powerful waves)

Ultimately, the best collective noun will depend on the specific type of waves you are referring to and the tone of your writing.