off Castle Island - A 25-foot sailboat grounds off Castle Island; two are pulled out and treated for hypothermia

A 25-foot sailboat ran aground off Castle Island, the well-known point guarding the entrance to Boston's inner harbour in South Boston. The two people aboard were rescued and, according to the Boston Fire Department, treated for hypothermia — a reminder that even a grounding a stone's throw from a city park puts you in water cold enough to hurt you. Reporting on this one is thin, and SeaWise is holding it at a lower confidence tier until the date and circumstances are firmed up (it should not be confused with a separate, similar incident in the Essex River in early May 2026, in which two brothers and a dog were rescued from a 30-foot sailboat). What the record does show is the ordinary shape of an urban-harbour mishap: proximity to shore breeds a false sense of safety, groundings happen fastest where the water shoals near land, and immersion in cold northern water is dangerous long before help is far away. The lesson is not exotic. It is that 'close to home' is exactly where casual boating bites.