Ms Sandeman urged both locals and visitors to the area to stay out of the water where Reggie has been spotted.
“I think if they move even a quarter of the mile down the coast, that would help,” she said.
“He’s not adult yet, so over the coming months he will get bigger, he will become more powerful.”
Most whales and dolphins are highly social and live in pods with their own kind – but some individuals, like Reggie, become solitary for reasons that are unclear, according to the charity.
That can cause problems when they eventually become used to people, it said.