The Seaside is a historic medical facility at 36 Shore Road in Waterford, Connecticut. It is nationally significant as the first institution designed for heliotropic treatment of children suffering from tuberculosis. Its buildings "comprise an exceptional collection of fully realized and generally well-preserved Tudor Revival-style institutional architecture", which were designed by Cass Gilbert. The property was listed on the National Register of Historic Places in 1995.

Waterford is a town in New London County, Connecticut. It is named after Waterford, Ireland. The town is part of the Southeastern Connecticut Planning Region. The population was 19,571 at the 2020 census. The town center is listed as a census-designated place (CDP) and had a population of 3,074 at the 2020 census.