Belleair Beach is a city in Pinellas County, Florida, United States.The approximate coordinates for the City of Belleair Beach is located in Central Florida at 27°55′29″N 82°50′22″W / 27.924748°N 82.839377°W / 27.924748; -82.839377.[6] The climate in this area is characterized by hot, humid summers, and generally mild winters.As of the 2020 United States census, there were 1,633 people, 689 households, and 444 families residing in the city.[10] As of the 2010 United States census, there were 1,560 people, 678 households, and 481 families residing in the city.