Sai Van Lake (Portuguese: Lago Sai Van; simplified Chinese: 西湾湖; traditional Chinese: 西灣湖; pinyin: xīwānhú) is one of two man made lakes in the Macau Peninsula. It is located at the southern tip of the peninsula.
The lake was once a bay and closed off by infill. Sai Van means West Bay.
Sai Van Lake is separated with Nam Van Lake by Avenida Dr Stanley Ho.