Sai Van Lake (Chinese: 西灣湖; Portuguese: Lago Sai Van) is a man-made lake in Sé, Macau.

It is located at the southern tip of Macau Peninsula.

[1] 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.