Found a Cold-Stunned Sea Turtle on Cape Cod? What to Do
In late fall, sea turtles trapped in Cape Cod Bay can become too cold to swim and wash ashore. Some barely move and may appear dead.
What to Do on the Beach
If a dog found the turtle first, leash the dog and move it away. Keep hands away from the turtle’s mouth and flippers, and leave hooks, fishing line, and visible injuries for trained responders.
Why Sea Turtles Cold-Stun on Cape Cod
Young sea turtles feed in New England waters during the warmer months and head south in fall. Those still inside Cape Cod Bay have to work their way around the hook of the Cape. As the bay cools, their metabolism and swimming ability slow. Wind, tide and current can then push a weakened turtle back toward shore instead of helping it clear the peninsula.
When Is Cold-Stunned Sea Turtle Season on Cape Cod?
The first cases can appear in late October. Strandings usually build from mid-November through December and can continue into January. Mass Audubon reports strandings beginning as ocean temperatures fall below about 55°F; NOAA notes that sea turtles are especially susceptible below 50°F (10°C). Cold fronts and persistent onshore wind can quickly increase strandings. Timing shifts with water temperature, wind and tide, so a quiet week does not mean the season is over.
How Large Can a Cape Cod Cold-Stun Event Become?
In recent years, roughly 770 cold-stunned sea turtles have been found along Cape Cod in an average season. Wellfleet Bay coordinates more than 200 trained volunteers who patrol beaches, recover stranded turtles and move them into the rehabilitation network. During busy weather windows, many turtles can arrive within a short period.
Walking Cape Cod Beaches During Turtle Season
If you are already walking the bay side in November or December, scan the upper beach and wrack line as well as the water's edge. Small turtles can be almost hidden by seaweed. After a cold spell or sustained onshore wind, pay extra attention around and after high tide, but search only where it is safe and legal to walk. Stay out of rough surf, ice and closed dunes.
A charged phone, warm windproof clothing and a clear idea of the nearest beach access are more useful than rescue gear. If you find a turtle, save a map pin and call before spending time on species identification or photographs.
The Cape Cod Bay side is the main cold-stun stranding area, but wind and current can shift the busiest stretches from one event to the next. Report any stranded sea turtle you find and give responders the exact beach access point.
Which Sea Turtles Strand on Cape Cod?
Kemp's ridley is the species most often found. It is the world's smallest sea turtle and is federally endangered. Green turtles also strand regularly. Loggerheads are less common but can be much larger and harder for one person to reposition safely. Leatherbacks occur in Massachusetts waters, but they are not part of the annual Cape Cod cold-stun pattern described here.
What Happens After You Call
Wellfleet Bay staff and trained volunteers retrieve the turtle, record where it was found and begin stabilization. Authorized transport then takes it to a rehabilitation facility, usually the New England Aquarium in Quincy or the National Marine Life Center in Buzzards Bay.
Warming happens slowly under veterinary care. The team checks body temperature, hydration, bloodwork, swimming ability and injuries. Pneumonia, dehydration, frostbite, infection and old wounds can complicate recovery. Some turtles are later transferred to partner facilities before release.
Typical path: beach → Wellfleet Bay → rehabilitation hospital → recovery → release.
Leave warming and transport to the rescue team. Do not put the turtle in a heated car or try to warm it yourself.
Who to Call — and How to Help
Different situation?
- Boston north to the New Hampshire–Maine border617-973-5247 · New England Aquarium Sea Turtle Rescue Hotline.
- Sea turtle entangled in the water800-900-3622 · Center for Coastal Studies. Do not enter the water or cut the turtle free yourself.
- Injured diamondback terrapin508-362-0111 · Cape Wildlife Center.
Want to volunteer? Wellfleet Bay’s cold-stun response uses trained volunteers. Its public Sea Turtle Patrol programs are educational, not volunteer training; ask the sanctuary about current volunteer openings before the season.
The New England Aquarium also recruits volunteers for animal care and other roles; its volunteer office is 617-973-5235 and vols@neaq.org. National Marine Life Center runs volunteer programs too; animal-care openings vary, and its main number is 508-743-9888. Never handle or transport a sea turtle unless you are working through an authorized program.
General Wellfleet Bay questions: wellfleet@massaudubon.org.
Related Massachusetts wildlife help: seal on a beach · turtle in the road.