Nam Wai () is a village in the Hebe Haven area of Sai Kung District, Hong Kong.
Nam Wai is a recognized village under the New Territories Small House Policy.
Nam Wai is a village of the Shing () and Yau () clans, established during the 18th century. It appears on the "Map of the San-On District", published in 1866 by Simeone Volonteri.
In September 2023, the head of the village, Sing Yuk-man (son of Sing Fui-on), was arrested for having 1kg of marijuana in his village house.
A Tin Hau Temple is located in Nam Wai.