Temple Sinai was an egalitarian, Reform Jewish synagogue that was located at 4401 Hatton Point Road, Portsmouth, Virginia, in the United States.

Its seven sponsoring members[3] agreed on the congregation's name within a few days and held their first religious service at the Portsmouth Women's Club on January 8, 1954.

[4] Until the construction of its building, services were also held at the Portsmouth Coca-Cola Bottling Works and the Suburban Country Club.

The cornerstone for the building on its 2 acres (0.81 ha) site on Hatton Point Road was laid in 1956.

As the only Jewish congregation among fifty congregations of the Portsmouth Volunteers for the Homeless, Temple Sinai distinguished itself by opening its doors for fifty to sixty homeless people during Christmas week, so that their Christian partners can be at home with their families during this season.