Hey guys- I fish out of NH and fish the same spots as you guys- Jeffries, Stellwagon, the inside humps, etc. Like others have said, groundfish jigging is here all season long (cod, haddoc, wolf fish, etc), and in a few weeks here the bluefin jigging will start. It's definitely effective up here. Stellwagon is the place to be for consistent shots at bluefin, whereas groundfish can be found just about anywhere. If there are specific questions, feel free to post them up or hit me with a PM- I'd be more than happy to fill you in on what I know...which should take about 15 seconds LOL

Here are a few jig reports from last year:
So Spoiled

White Boot Report

How to kill a skunk with a jig