Read the whole thing
here.
money quote:
"The second oddity seems to be that it sure looks like the sound is warmer than Buzzards Bay. Why do we say that? Because Nantucket Sound has both scup and sea bass, and Buzzards doesn't. That's Weird No. 2. Jeez-um crow, a Cape Codder named Frank Webber even caught a squeteague already - from shore (see Area 4 below). These fish have no bidness being in our waters until it's well beyond pleasant swimming temperatures, which is not how most folks would describe things at the moment.
This is when South Cape Beach, Cotuit-Osterville and Popponesset shine. They are the stars of our show. If you want to be really sure you catch a fish, go to the upper southside beaches, which certainly get the Blue Ribbon Award right now. Your chances are good elsewhere, but for now, as happens early every year, this region is nothing but the best."