seals-off-chatham-beach July 9, 2021 600 × 254 great white sharks on cape cod Grey seals gather onshore on a beach in Chatham, MA. Avoid swimming in waters with lots of seals to reduce risk of a shark attack. Related:dog-friendly restaurants in chathamOversand Beach Driving: Beach ORV Trails on Cape Codmarconi beach in wellfleet, maWhat is the Nicest Beach on Cape Cod?nauset light beach in eastham, mahead of the meadow beach in truro, ma