Here's a few places in trhe vacinity to try from shore.
-The mouth of the Scarborough River between Pine Point and Prouts Neck, north of OOB.
-Around and Under the piers at OOB
-Gooseneck Brook in Ocean Park (south of OOB)
-Rocks by the rectory at the end of Bay View Drive
-Saco River Jetties
Here's the NOAA chart of Saco Bay where you can locate these suggestions or pick ut some of your own.