Open Water Data

Jackknife Harbor

Chatham, Massachusetts, United States

  • Water Quality Status
    No relevant data Wed, Jan 28, 2026 at 10:21am

Jackknife Harbor Beach is shared between North Chatham and Harwich. The beach has a sheltered cove for children, and the water is shallow and warm. There are also great views across Pleasant Bay! There are no lifeguards on duty and no restrooms. Dogs are allowed on the beach before 9am and after 6pm.

The description above was copied from or heavily based on Swim Guide, with permission.

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