No predictions loaded for 2046. This site serves NOAA predictions from its own store, and this period has not been fetched for Boston yet. Nothing is estimated or interpolated in its place. NOAA's own page for the station has the official table: tidesandcurrents.noaa.gov.
tidealmanac.site/us/ma/boston-8443970/2046
Boston, MA tide table 2046 (printable) · Tide Almanac