Yes, but I believe it’s by each state law, and they vary, that you’re allowed on beaches,( and waterways?) to high tide mark. Murphy signed this in 2019 giving public access.

Public Rights under the Public Trust Doctrine
The Pubic Trust Doctrine provides that public rights to tidal waterways and their shores in the state are held by the state in trust for the benefit of all of the people. Further, it establishes the right of the public to fully utilize these lands and waters for a variety of public activities.…