Cape Cod and Nantucket are home to one of the densest gray seal populations on the East Coast, and the great white sharks that prey on them patrol the outer beach and Monomoy shallows from June through October — overlapping directly with peak swimming and surfing season. SharkWatch tracks confirmed white shark detections and sightings from Chatham to Truro and pushes a real-time alert to your phone when a verified event occurs at or near your saved Cape beach.
Get alerts for Cape Cod / Nantucket, MA — $19 lifetimeOne-time payment · Works on iPhone & Android · Refund anytime before launch
Incidents our system tracked within 200km in the last 90 days. Alerts only fire for confirmed events.
No shark incidents tracked within 200km of Cape Cod / Nantucket, MA in the last 90 days — that's exactly when a surprise sighting matters most.
Lulu's Law was signed June 26, 2026 — Amber-Alert-style shark warnings are coming. But the FCC has 180 days to build them (~late December), and they only fire after an attack, where it happened. SharkWatch alerts you to confirmed bites and sightings near Cape Cod / Nantucket, MA all summer.
Become a SharkWatch member ($19 once, lifetime), install the web app to your phone's home screen, and save Cape Cod / Nantucket, MA as your beach. When a shark bite or sighting is confirmed within 200km, your phone gets a push alert.
SharkWatch confirms incidents from multiple independent news domains or an official report (lifeguards, police, beach authority) before alerting. Lulu's Law was signed June 26, 2026, but the FCC has 180 days to build the federal system — alerts aren't expected until ~late December 2026, and they only fire after an attack.
No. You save beach regions; we match confirmed incidents to those regions. The app never follows your phone around.