My GUESS is that the Cape Cod area now has BOTH “year round resident” Great Whites AND “transitory” Great Whites, that come to New England waters at certain times to FEED on marine mammals & perhaps TO BIRTH PUPS somewhere nearby.
In my opinion, UNTIL/UNLESS the swimming beaches are “fenced off” to separate the swimmers from the sharks AND/OR limited hunting (”on license”) is allowed for Great Whites AND for seals, that the current dangerous situation for the swimmers/surfers is PERMANENT.
Further south, for example on The Outer Banks & other coastal areas of NC (where our family has an Atlantic shore beach-house), we only have “visiting” Great whites, I suspect because the water is too warm for the Whites much of the year.
(Also, there are FEW marine mammals on the southern Atlantic coast for the Whites to prey upon.)
Yours, TMN78247
The sharks will leave if the food source is gone. There must be seals in the area for the sharks to eat. They probably don’t like the taste of rancid liberals which is probably the reason they didn’t eat any people this year.