Seawall Surf varies with the swell direction, size, and location. The Flagship Pier offers a long right and left peaks off the "T-Head" on a big swell. Paddle out thru the deep channel under the pier. 37th Street can provide a steep, ledgy left on the same swell. Farther down by the San Luis Hotel you'll find slower beachbreak waves. 61st Street has good out side take off at the pier and a powerful inside jetty-protected bowl. That offers protection from strong sidecurrents that may accompany a large swell. All these offer good surfing waves, but are subject to change with the daily tides, or sandbar movement.
Then comes miles of definitionless beach break (Pirates, etc) until your get to San Luis Pass. Here all of Galveston Bay empties out in a pass less than a half mile wide. The sand piles up and so the waves break pretty far out, but on big swells a few push down the channel. While there are some good looking waves on occasion on either the left or right side, the place has two major problems: a death current and large and numerous sharks. On the wrong tide conditions even a power boat can't fight the current. Many DEATHS have been recorded here; drowning happens.