I have shrimped primarily in the south bay for quite a few years and my experience is that it is usually better at night unless you get out close to the ocean.
I like low to high tide change right at or just after dark.
Seaswirl 2101wa, 200 Yamaha 4s, Lowe Roughneck 1655 85 Yamaha jet drive
We did some shrimping north of Buck hall on Sunday. We launched about 6:30 am and filled our 48 qt cooler.
Seafox 209 Commander