The flag of the city of Seaside, California, is white with a horizontal yellow stripe at the bottom. The hight of the yellow stripe is 1/9 of the flag's hight.
Centered in the white part is the city's logo, consisting of a white sea horse on dark green grond and two white wave lines and a white sun on blue ground, surrounded by the words CITY OF SEASIDE CALIFORNIA. for a better view at the logo, check out the city's webside.
The picture on this side it taken from the flag shown at the local fire department. Other flags can be found in front of the city hall and at the city's welcome sign on Fremont Street.