Seal Beach is located at 33°44'29" North, 118°6'14" West (33.741389, -118.103889).
According to the United States Census Bureau, the city has a total area of 13.22 mi2 (34.24 km2). 11.51 mi2 (29.80 km2) of it is land and 1.72 mi2 (4.44 km2) of it is covered by water. The total area is 12.97% water.
Seal Beach is located in the Pacific Standard Time (PST) timezone, GMT-08:00. It observes Daylight Saving Time (DST).